net/mac80211/util.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright 2002-2005, Instant802 Networks, Inc.
   4  * Copyright 2005-2006, Devicescape Software, Inc.
   5  * Copyright 2006-2007  Jiri Benc <jbenc@suse.cz>
   6  * Copyright 2007       Johannes Berg <johannes@sipsolutions.net>
   7  * Copyright 2013-2014  Intel Mobile Communications GmbH
   8  * Copyright (C) 2015-2017      Intel Deutschland GmbH
   9  * Copyright (C) 2018-2020 Intel Corporation
  10  *
  11  * utilities for mac80211
  12  */
  13
  14 #include <net/mac80211.h>
  15 #include <linux/netdevice.h>
  16 #include <linux/export.h>
  17 #include <linux/types.h>
  18 #include <linux/slab.h>
  19 #include <linux/skbuff.h>
  20 #include <linux/etherdevice.h>
  21 #include <linux/if_arp.h>
  22 #include <linux/bitmap.h>
  23 #include <linux/crc32.h>
  24 #include <net/net_namespace.h>
  25 #include <net/cfg80211.h>
  26 #include <net/rtnetlink.h>
  27
  28 #include "ieee80211_i.h"
  29 #include "driver-ops.h"
  30 #include "rate.h"
  31 #include "mesh.h"
  32 #include "wme.h"
  33 #include "led.h"
  34 #include "wep.h"
  35
  36 /* privid for wiphys to determine whether they belong to us or not */
  37 const void *const mac80211_wiphy_privid = &mac80211_wiphy_privid;
  38
  39 struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy)
  40 {
  41         struct ieee80211_local *local;
  42
  43         local = wiphy_priv(wiphy);
  44         return &local->hw;
  45 }
  46 EXPORT_SYMBOL(wiphy_to_ieee80211_hw);
  47
  48 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx)
  49 {
  50         struct sk_buff *skb;
  51         struct ieee80211_hdr *hdr;
  52
  53         skb_queue_walk(&tx->skbs, skb) {
  54                 hdr = (struct ieee80211_hdr *) skb->data;
  55                 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
  56         }
  57 }
  58
  59 int ieee80211_frame_duration(enum nl80211_band band, size_t len,
  60                              int rate, int erp, int short_preamble,
  61                              int shift)
  62 {
  63         int dur;
  64
  65         /* calculate duration (in microseconds, rounded up to next higher
  66          * integer if it includes a fractional microsecond) to send frame of
  67          * len bytes (does not include FCS) at the given rate. Duration will
  68          * also include SIFS.
  69          *
  70          * rate is in 100 kbps, so divident is multiplied by 10 in the
  71          * DIV_ROUND_UP() operations.
  72          *
  73          * shift may be 2 for 5 MHz channels or 1 for 10 MHz channels, and
  74          * is assumed to be 0 otherwise.
  75          */
  76
  77         if (band == NL80211_BAND_5GHZ || erp) {
  78                 /*
  79                  * OFDM:
  80                  *
  81                  * N_DBPS = DATARATE x 4
  82                  * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
  83                  *      (16 = SIGNAL time, 6 = tail bits)
  84                  * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
  85                  *
  86                  * T_SYM = 4 usec
  87                  * 802.11a - 18.5.2: aSIFSTime = 16 usec
  88                  * 802.11g - 19.8.4: aSIFSTime = 10 usec +
  89                  *      signal ext = 6 usec
  90                  */
  91                 dur = 16; /* SIFS + signal ext */
  92                 dur += 16; /* IEEE 802.11-2012 18.3.2.4: T_PREAMBLE = 16 usec */
  93                 dur += 4; /* IEEE 802.11-2012 18.3.2.4: T_SIGNAL = 4 usec */
  94
  95                 /* IEEE 802.11-2012 18.3.2.4: all values above are:
  96                  *  * times 4 for 5 MHz
  97                  *  * times 2 for 10 MHz
  98                  */
  99                 dur *= 1 << shift;
 100
 101                 /* rates should already consider the channel bandwidth,
 102                  * don't apply divisor again.
 103                  */
 104                 dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10,
 105                                         4 * rate); /* T_SYM x N_SYM */
 106         } else {
 107                 /*
 108                  * 802.11b or 802.11g with 802.11b compatibility:
 109                  * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
 110                  * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
 111                  *
 112                  * 802.11 (DS): 15.3.3, 802.11b: 18.3.4
 113                  * aSIFSTime = 10 usec
 114                  * aPreambleLength = 144 usec or 72 usec with short preamble
 115                  * aPLCPHeaderLength = 48 usec or 24 usec with short preamble
 116                  */
 117                 dur = 10; /* aSIFSTime = 10 usec */
 118                 dur += short_preamble ? (72 + 24) : (144 + 48);
 119
 120                 dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate);
 121         }
 122
 123         return dur;
 124 }
 125
 126 /* Exported duration function for driver use */
 127 __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
 128                                         struct ieee80211_vif *vif,
 129                                         enum nl80211_band band,
 130                                         size_t frame_len,
 131                                         struct ieee80211_rate *rate)
 132 {
 133         struct ieee80211_sub_if_data *sdata;
 134         u16 dur;
 135         int erp, shift = 0;
 136         bool short_preamble = false;
 137
 138         erp = 0;
 139         if (vif) {
 140                 sdata = vif_to_sdata(vif);
 141                 short_preamble = sdata->vif.bss_conf.use_short_preamble;
 142                 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
 143                         erp = rate->flags & IEEE80211_RATE_ERP_G;
 144                 shift = ieee80211_vif_get_shift(vif);
 145         }
 146
 147         dur = ieee80211_frame_duration(band, frame_len, rate->bitrate, erp,
 148                                        short_preamble, shift);
 149
 150         return cpu_to_le16(dur);
 151 }
 152 EXPORT_SYMBOL(ieee80211_generic_frame_duration);
 153
 154 __le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
 155                               struct ieee80211_vif *vif, size_t frame_len,
 156                               const struct ieee80211_tx_info *frame_txctl)
 157 {
 158         struct ieee80211_local *local = hw_to_local(hw);
 159         struct ieee80211_rate *rate;
 160         struct ieee80211_sub_if_data *sdata;
 161         bool short_preamble;
 162         int erp, shift = 0, bitrate;
 163         u16 dur;
 164         struct ieee80211_supported_band *sband;
 165
 166         sband = local->hw.wiphy->bands[frame_txctl->band];
 167
 168         short_preamble = false;
 169
 170         rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
 171
 172         erp = 0;
 173         if (vif) {
 174                 sdata = vif_to_sdata(vif);
 175                 short_preamble = sdata->vif.bss_conf.use_short_preamble;
 176                 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
 177                         erp = rate->flags & IEEE80211_RATE_ERP_G;
 178                 shift = ieee80211_vif_get_shift(vif);
 179         }
 180
 181         bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
 182
 183         /* CTS duration */
 184         dur = ieee80211_frame_duration(sband->band, 10, bitrate,
 185                                        erp, short_preamble, shift);
 186         /* Data frame duration */
 187         dur += ieee80211_frame_duration(sband->band, frame_len, bitrate,
 188                                         erp, short_preamble, shift);
 189         /* ACK duration */
 190         dur += ieee80211_frame_duration(sband->band, 10, bitrate,
 191                                         erp, short_preamble, shift);
 192
 193         return cpu_to_le16(dur);
 194 }
 195 EXPORT_SYMBOL(ieee80211_rts_duration);
 196
 197 __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
 198                                     struct ieee80211_vif *vif,
 199                                     size_t frame_len,
 200                                     const struct ieee80211_tx_info *frame_txctl)
 201 {
 202         struct ieee80211_local *local = hw_to_local(hw);
 203         struct ieee80211_rate *rate;
 204         struct ieee80211_sub_if_data *sdata;
 205         bool short_preamble;
 206         int erp, shift = 0, bitrate;
 207         u16 dur;
 208         struct ieee80211_supported_band *sband;
 209
 210         sband = local->hw.wiphy->bands[frame_txctl->band];
 211
 212         short_preamble = false;
 213
 214         rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
 215         erp = 0;
 216         if (vif) {
 217                 sdata = vif_to_sdata(vif);
 218                 short_preamble = sdata->vif.bss_conf.use_short_preamble;
 219                 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
 220                         erp = rate->flags & IEEE80211_RATE_ERP_G;
 221                 shift = ieee80211_vif_get_shift(vif);
 222         }
 223
 224         bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
 225
 226         /* Data frame duration */
 227         dur = ieee80211_frame_duration(sband->band, frame_len, bitrate,
 228                                        erp, short_preamble, shift);
 229         if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) {
 230                 /* ACK duration */
 231                 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
 232                                                 erp, short_preamble, shift);
 233         }
 234
 235         return cpu_to_le16(dur);
 236 }
 237 EXPORT_SYMBOL(ieee80211_ctstoself_duration);
 238
 239 static void __ieee80211_wake_txqs(struct ieee80211_sub_if_data *sdata, int ac)
 240 {
 241         struct ieee80211_local *local = sdata->local;
 242         struct ieee80211_vif *vif = &sdata->vif;
 243         struct fq *fq = &local->fq;
 244         struct ps_data *ps = NULL;
 245         struct txq_info *txqi;
 246         struct sta_info *sta;
 247         int i;
 248
 249         local_bh_disable();
 250         spin_lock(&fq->lock);
 251
 252         if (sdata->vif.type == NL80211_IFTYPE_AP)
 253                 ps = &sdata->bss->ps;
 254
 255         sdata->vif.txqs_stopped[ac] = false;
 256
 257         list_for_each_entry_rcu(sta, &local->sta_list, list) {
 258                 if (sdata != sta->sdata)
 259                         continue;
 260
 261                 for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) {
 262                         struct ieee80211_txq *txq = sta->sta.txq[i];
 263
 264                         if (!txq)
 265                                 continue;
 266
 267                         txqi = to_txq_info(txq);
 268
 269                         if (ac != txq->ac)
 270                                 continue;
 271
 272                         if (!test_and_clear_bit(IEEE80211_TXQ_STOP_NETIF_TX,
 273                                                 &txqi->flags))
 274                                 continue;
 275
 276                         spin_unlock(&fq->lock);
 277                         drv_wake_tx_queue(local, txqi);
 278                         spin_lock(&fq->lock);
 279                 }
 280         }
 281
 282         if (!vif->txq)
 283                 goto out;
 284
 285         txqi = to_txq_info(vif->txq);
 286
 287         if (!test_and_clear_bit(IEEE80211_TXQ_STOP_NETIF_TX, &txqi->flags) ||
 288             (ps && atomic_read(&ps->num_sta_ps)) || ac != vif->txq->ac)
 289                 goto out;
 290
 291         spin_unlock(&fq->lock);
 292
 293         drv_wake_tx_queue(local, txqi);
 294         local_bh_enable();
 295         return;
 296 out:
 297         spin_unlock(&fq->lock);
 298         local_bh_enable();
 299 }
 300
 301 static void
 302 __releases(&local->queue_stop_reason_lock)
 303 __acquires(&local->queue_stop_reason_lock)
 304 _ieee80211_wake_txqs(struct ieee80211_local *local, unsigned long *flags)
 305 {
 306         struct ieee80211_sub_if_data *sdata;
 307         int n_acs = IEEE80211_NUM_ACS;
 308         int i;
 309
 310         rcu_read_lock();
 311
 312         if (local->hw.queues < IEEE80211_NUM_ACS)
 313                 n_acs = 1;
 314
 315         for (i = 0; i < local->hw.queues; i++) {
 316                 if (local->queue_stop_reasons[i])
 317                         continue;
 318
 319                 spin_unlock_irqrestore(&local->queue_stop_reason_lock, *flags);
 320                 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 321                         int ac;
 322
 323                         for (ac = 0; ac < n_acs; ac++) {
 324                                 int ac_queue = sdata->vif.hw_queue[ac];
 325
 326                                 if (ac_queue == i ||
 327                                     sdata->vif.cab_queue == i)
 328                                         __ieee80211_wake_txqs(sdata, ac);
 329                         }
 330                 }
 331                 spin_lock_irqsave(&local->queue_stop_reason_lock, *flags);
 332         }
 333
 334         rcu_read_unlock();
 335 }
 336
 337 void ieee80211_wake_txqs(unsigned long data)
 338 {
 339         struct ieee80211_local *local = (struct ieee80211_local *)data;
 340         unsigned long flags;
 341
 342         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 343         _ieee80211_wake_txqs(local, &flags);
 344         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 345 }
 346
 347 void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue)
 348 {
 349         struct ieee80211_sub_if_data *sdata;
 350         int n_acs = IEEE80211_NUM_ACS;
 351
 352         if (local->ops->wake_tx_queue)
 353                 return;
 354
 355         if (local->hw.queues < IEEE80211_NUM_ACS)
 356                 n_acs = 1;
 357
 358         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 359                 int ac;
 360
 361                 if (!sdata->dev)
 362                         continue;
 363
 364                 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE &&
 365                     local->queue_stop_reasons[sdata->vif.cab_queue] != 0)
 366                         continue;
 367
 368                 for (ac = 0; ac < n_acs; ac++) {
 369                         int ac_queue = sdata->vif.hw_queue[ac];
 370
 371                         if (ac_queue == queue ||
 372                             (sdata->vif.cab_queue == queue &&
 373                              local->queue_stop_reasons[ac_queue] == 0 &&
 374                              skb_queue_empty(&local->pending[ac_queue])))
 375                                 netif_wake_subqueue(sdata->dev, ac);
 376                 }
 377         }
 378 }
 379
 380 static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
 381                                    enum queue_stop_reason reason,
 382                                    bool refcounted,
 383                                    unsigned long *flags)
 384 {
 385         struct ieee80211_local *local = hw_to_local(hw);
 386
 387         trace_wake_queue(local, queue, reason);
 388
 389         if (WARN_ON(queue >= hw->queues))
 390                 return;
 391
 392         if (!test_bit(reason, &local->queue_stop_reasons[queue]))
 393                 return;
 394
 395         if (!refcounted) {
 396                 local->q_stop_reasons[queue][reason] = 0;
 397         } else {
 398                 local->q_stop_reasons[queue][reason]--;
 399                 if (WARN_ON(local->q_stop_reasons[queue][reason] < 0))
 400                         local->q_stop_reasons[queue][reason] = 0;
 401         }
 402
 403         if (local->q_stop_reasons[queue][reason] == 0)
 404                 __clear_bit(reason, &local->queue_stop_reasons[queue]);
 405
 406         if (local->queue_stop_reasons[queue] != 0)
 407                 /* someone still has this queue stopped */
 408                 return;
 409
 410         if (skb_queue_empty(&local->pending[queue])) {
 411                 rcu_read_lock();
 412                 ieee80211_propagate_queue_wake(local, queue);
 413                 rcu_read_unlock();
 414         } else
 415                 tasklet_schedule(&local->tx_pending_tasklet);
 416
 417         /*
 418          * Calling _ieee80211_wake_txqs here can be a problem because it may
 419          * release queue_stop_reason_lock which has been taken by
 420          * __ieee80211_wake_queue's caller. It is certainly not very nice to
 421          * release someone's lock, but it is fine because all the callers of
 422          * __ieee80211_wake_queue call it right before releasing the lock.
 423          */
 424         if (local->ops->wake_tx_queue) {
 425                 if (reason == IEEE80211_QUEUE_STOP_REASON_DRIVER)
 426                         tasklet_schedule(&local->wake_txqs_tasklet);
 427                 else
 428                         _ieee80211_wake_txqs(local, flags);
 429         }
 430 }
 431
 432 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
 433                                     enum queue_stop_reason reason,
 434                                     bool refcounted)
 435 {
 436         struct ieee80211_local *local = hw_to_local(hw);
 437         unsigned long flags;
 438
 439         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 440         __ieee80211_wake_queue(hw, queue, reason, refcounted, &flags);
 441         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 442 }
 443
 444 void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
 445 {
 446         ieee80211_wake_queue_by_reason(hw, queue,
 447                                        IEEE80211_QUEUE_STOP_REASON_DRIVER,
 448                                        false);
 449 }
 450 EXPORT_SYMBOL(ieee80211_wake_queue);
 451
 452 static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
 453                                    enum queue_stop_reason reason,
 454                                    bool refcounted)
 455 {
 456         struct ieee80211_local *local = hw_to_local(hw);
 457         struct ieee80211_sub_if_data *sdata;
 458         int n_acs = IEEE80211_NUM_ACS;
 459
 460         trace_stop_queue(local, queue, reason);
 461
 462         if (WARN_ON(queue >= hw->queues))
 463                 return;
 464
 465         if (!refcounted)
 466                 local->q_stop_reasons[queue][reason] = 1;
 467         else
 468                 local->q_stop_reasons[queue][reason]++;
 469
 470         if (__test_and_set_bit(reason, &local->queue_stop_reasons[queue]))
 471                 return;
 472
 473         if (local->hw.queues < IEEE80211_NUM_ACS)
 474                 n_acs = 1;
 475
 476         rcu_read_lock();
 477         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 478                 int ac;
 479
 480                 if (!sdata->dev)
 481                         continue;
 482
 483                 for (ac = 0; ac < n_acs; ac++) {
 484                         if (sdata->vif.hw_queue[ac] == queue ||
 485                             sdata->vif.cab_queue == queue) {
 486                                 if (!local->ops->wake_tx_queue) {
 487                                         netif_stop_subqueue(sdata->dev, ac);
 488                                         continue;
 489                                 }
 490                                 spin_lock(&local->fq.lock);
 491                                 sdata->vif.txqs_stopped[ac] = true;
 492                                 spin_unlock(&local->fq.lock);
 493                         }
 494                 }
 495         }
 496         rcu_read_unlock();
 497 }
 498
 499 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
 500                                     enum queue_stop_reason reason,
 501                                     bool refcounted)
 502 {
 503         struct ieee80211_local *local = hw_to_local(hw);
 504         unsigned long flags;
 505
 506         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 507         __ieee80211_stop_queue(hw, queue, reason, refcounted);
 508         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 509 }
 510
 511 void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
 512 {
 513         ieee80211_stop_queue_by_reason(hw, queue,
 514                                        IEEE80211_QUEUE_STOP_REASON_DRIVER,
 515                                        false);
 516 }
 517 EXPORT_SYMBOL(ieee80211_stop_queue);
 518
 519 void ieee80211_add_pending_skb(struct ieee80211_local *local,
 520                                struct sk_buff *skb)
 521 {
 522         struct ieee80211_hw *hw = &local->hw;
 523         unsigned long flags;
 524         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 525         int queue = info->hw_queue;
 526
 527         if (WARN_ON(!info->control.vif)) {
 528                 ieee80211_free_txskb(&local->hw, skb);
 529                 return;
 530         }
 531
 532         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 533         __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 534                                false);
 535         __skb_queue_tail(&local->pending[queue], skb);
 536         __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 537                                false, &flags);
 538         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 539 }
 540
 541 void ieee80211_add_pending_skbs(struct ieee80211_local *local,
 542                                 struct sk_buff_head *skbs)
 543 {
 544         struct ieee80211_hw *hw = &local->hw;
 545         struct sk_buff *skb;
 546         unsigned long flags;
 547         int queue, i;
 548
 549         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 550         while ((skb = skb_dequeue(skbs))) {
 551                 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 552
 553                 if (WARN_ON(!info->control.vif)) {
 554                         ieee80211_free_txskb(&local->hw, skb);
 555                         continue;
 556                 }
 557
 558                 queue = info->hw_queue;
 559
 560                 __ieee80211_stop_queue(hw, queue,
 561                                 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 562                                 false);
 563
 564                 __skb_queue_tail(&local->pending[queue], skb);
 565         }
 566
 567         for (i = 0; i < hw->queues; i++)
 568                 __ieee80211_wake_queue(hw, i,
 569                         IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 570                         false, &flags);
 571         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 572 }
 573
 574 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
 575                                      unsigned long queues,
 576                                      enum queue_stop_reason reason,
 577                                      bool refcounted)
 578 {
 579         struct ieee80211_local *local = hw_to_local(hw);
 580         unsigned long flags;
 581         int i;
 582
 583         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 584
 585         for_each_set_bit(i, &queues, hw->queues)
 586                 __ieee80211_stop_queue(hw, i, reason, refcounted);
 587
 588         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 589 }
 590
 591 void ieee80211_stop_queues(struct ieee80211_hw *hw)
 592 {
 593         ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
 594                                         IEEE80211_QUEUE_STOP_REASON_DRIVER,
 595                                         false);
 596 }
 597 EXPORT_SYMBOL(ieee80211_stop_queues);
 598
 599 int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
 600 {
 601         struct ieee80211_local *local = hw_to_local(hw);
 602         unsigned long flags;
 603         int ret;
 604
 605         if (WARN_ON(queue >= hw->queues))
 606                 return true;
 607
 608         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 609         ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER,
 610                        &local->queue_stop_reasons[queue]);
 611         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 612         return ret;
 613 }
 614 EXPORT_SYMBOL(ieee80211_queue_stopped);
 615
 616 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
 617                                      unsigned long queues,
 618                                      enum queue_stop_reason reason,
 619                                      bool refcounted)
 620 {
 621         struct ieee80211_local *local = hw_to_local(hw);
 622         unsigned long flags;
 623         int i;
 624
 625         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 626
 627         for_each_set_bit(i, &queues, hw->queues)
 628                 __ieee80211_wake_queue(hw, i, reason, refcounted, &flags);
 629
 630         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 631 }
 632
 633 void ieee80211_wake_queues(struct ieee80211_hw *hw)
 634 {
 635         ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
 636                                         IEEE80211_QUEUE_STOP_REASON_DRIVER,
 637                                         false);
 638 }
 639 EXPORT_SYMBOL(ieee80211_wake_queues);
 640
 641 static unsigned int
 642 ieee80211_get_vif_queues(struct ieee80211_local *local,
 643                          struct ieee80211_sub_if_data *sdata)
 644 {
 645         unsigned int queues;
 646
 647         if (sdata && ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) {
 648                 int ac;
 649
 650                 queues = 0;
 651
 652                 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
 653                         queues |= BIT(sdata->vif.hw_queue[ac]);
 654                 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE)
 655                         queues |= BIT(sdata->vif.cab_queue);
 656         } else {
 657                 /* all queues */
 658                 queues = BIT(local->hw.queues) - 1;
 659         }
 660
 661         return queues;
 662 }
 663
 664 void __ieee80211_flush_queues(struct ieee80211_local *local,
 665                               struct ieee80211_sub_if_data *sdata,
 666                               unsigned int queues, bool drop)
 667 {
 668         if (!local->ops->flush)
 669                 return;
 670
 671         /*
 672          * If no queue was set, or if the HW doesn't support
 673          * IEEE80211_HW_QUEUE_CONTROL - flush all queues
 674          */
 675         if (!queues || !ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
 676                 queues = ieee80211_get_vif_queues(local, sdata);
 677
 678         ieee80211_stop_queues_by_reason(&local->hw, queues,
 679                                         IEEE80211_QUEUE_STOP_REASON_FLUSH,
 680                                         false);
 681
 682         drv_flush(local, sdata, queues, drop);
 683
 684         ieee80211_wake_queues_by_reason(&local->hw, queues,
 685                                         IEEE80211_QUEUE_STOP_REASON_FLUSH,
 686                                         false);
 687 }
 688
 689 void ieee80211_flush_queues(struct ieee80211_local *local,
 690                             struct ieee80211_sub_if_data *sdata, bool drop)
 691 {
 692         __ieee80211_flush_queues(local, sdata, 0, drop);
 693 }
 694
 695 void ieee80211_stop_vif_queues(struct ieee80211_local *local,
 696                                struct ieee80211_sub_if_data *sdata,
 697                                enum queue_stop_reason reason)
 698 {
 699         ieee80211_stop_queues_by_reason(&local->hw,
 700                                         ieee80211_get_vif_queues(local, sdata),
 701                                         reason, true);
 702 }
 703
 704 void ieee80211_wake_vif_queues(struct ieee80211_local *local,
 705                                struct ieee80211_sub_if_data *sdata,
 706                                enum queue_stop_reason reason)
 707 {
 708         ieee80211_wake_queues_by_reason(&local->hw,
 709                                         ieee80211_get_vif_queues(local, sdata),
 710                                         reason, true);
 711 }
 712
 713 static void __iterate_interfaces(struct ieee80211_local *local,
 714                                  u32 iter_flags,
 715                                  void (*iterator)(void *data, u8 *mac,
 716                                                   struct ieee80211_vif *vif),
 717                                  void *data)
 718 {
 719         struct ieee80211_sub_if_data *sdata;
 720         bool active_only = iter_flags & IEEE80211_IFACE_ITER_ACTIVE;
 721
 722         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 723                 switch (sdata->vif.type) {
 724                 case NL80211_IFTYPE_MONITOR:
 725                         if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
 726                                 continue;
 727                         break;
 728                 case NL80211_IFTYPE_AP_VLAN:
 729                         continue;
 730                 default:
 731                         break;
 732                 }
 733                 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
 734                     active_only && !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 735                         continue;
 736                 if (ieee80211_sdata_running(sdata) || !active_only)
 737                         iterator(data, sdata->vif.addr,
 738                                  &sdata->vif);
 739         }
 740
 741         sdata = rcu_dereference_check(local->monitor_sdata,
 742                                       lockdep_is_held(&local->iflist_mtx) ||
 743                                       lockdep_rtnl_is_held());
 744         if (sdata &&
 745             (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL || !active_only ||
 746              sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 747                 iterator(data, sdata->vif.addr, &sdata->vif);
 748 }
 749
 750 void ieee80211_iterate_interfaces(
 751         struct ieee80211_hw *hw, u32 iter_flags,
 752         void (*iterator)(void *data, u8 *mac,
 753                          struct ieee80211_vif *vif),
 754         void *data)
 755 {
 756         struct ieee80211_local *local = hw_to_local(hw);
 757
 758         mutex_lock(&local->iflist_mtx);
 759         __iterate_interfaces(local, iter_flags, iterator, data);
 760         mutex_unlock(&local->iflist_mtx);
 761 }
 762 EXPORT_SYMBOL_GPL(ieee80211_iterate_interfaces);
 763
 764 void ieee80211_iterate_active_interfaces_atomic(
 765         struct ieee80211_hw *hw, u32 iter_flags,
 766         void (*iterator)(void *data, u8 *mac,
 767                          struct ieee80211_vif *vif),
 768         void *data)
 769 {
 770         struct ieee80211_local *local = hw_to_local(hw);
 771
 772         rcu_read_lock();
 773         __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
 774                              iterator, data);
 775         rcu_read_unlock();
 776 }
 777 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
 778
 779 void ieee80211_iterate_active_interfaces_rtnl(
 780         struct ieee80211_hw *hw, u32 iter_flags,
 781         void (*iterator)(void *data, u8 *mac,
 782                          struct ieee80211_vif *vif),
 783         void *data)
 784 {
 785         struct ieee80211_local *local = hw_to_local(hw);
 786
 787         ASSERT_RTNL();
 788
 789         __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
 790                              iterator, data);
 791 }
 792 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_rtnl);
 793
 794 static void __iterate_stations(struct ieee80211_local *local,
 795                                void (*iterator)(void *data,
 796                                                 struct ieee80211_sta *sta),
 797                                void *data)
 798 {
 799         struct sta_info *sta;
 800
 801         list_for_each_entry_rcu(sta, &local->sta_list, list) {
 802                 if (!sta->uploaded)
 803                         continue;
 804
 805                 iterator(data, &sta->sta);
 806         }
 807 }
 808
 809 void ieee80211_iterate_stations_atomic(struct ieee80211_hw *hw,
 810                         void (*iterator)(void *data,
 811                                          struct ieee80211_sta *sta),
 812                         void *data)
 813 {
 814         struct ieee80211_local *local = hw_to_local(hw);
 815
 816         rcu_read_lock();
 817         __iterate_stations(local, iterator, data);
 818         rcu_read_unlock();
 819 }
 820 EXPORT_SYMBOL_GPL(ieee80211_iterate_stations_atomic);
 821
 822 struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev)
 823 {
 824         struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
 825
 826         if (!ieee80211_sdata_running(sdata) ||
 827             !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 828                 return NULL;
 829         return &sdata->vif;
 830 }
 831 EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif);
 832
 833 struct wireless_dev *ieee80211_vif_to_wdev(struct ieee80211_vif *vif)
 834 {
 835         struct ieee80211_sub_if_data *sdata;
 836
 837         if (!vif)
 838                 return NULL;
 839
 840         sdata = vif_to_sdata(vif);
 841
 842         if (!ieee80211_sdata_running(sdata) ||
 843             !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 844                 return NULL;
 845
 846         return &sdata->wdev;
 847 }
 848 EXPORT_SYMBOL_GPL(ieee80211_vif_to_wdev);
 849
 850 /*
 851  * Nothing should have been stuffed into the workqueue during
 852  * the suspend->resume cycle. Since we can't check each caller
 853  * of this function if we are already quiescing / suspended,
 854  * check here and don't WARN since this can actually happen when
 855  * the rx path (for example) is racing against __ieee80211_suspend
 856  * and suspending / quiescing was set after the rx path checked
 857  * them.
 858  */
 859 static bool ieee80211_can_queue_work(struct ieee80211_local *local)
 860 {
 861         if (local->quiescing || (local->suspended && !local->resuming)) {
 862                 pr_warn("queueing ieee80211 work while going to suspend\n");
 863                 return false;
 864         }
 865
 866         return true;
 867 }
 868
 869 void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
 870 {
 871         struct ieee80211_local *local = hw_to_local(hw);
 872
 873         if (!ieee80211_can_queue_work(local))
 874                 return;
 875
 876         queue_work(local->workqueue, work);
 877 }
 878 EXPORT_SYMBOL(ieee80211_queue_work);
 879
 880 void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
 881                                   struct delayed_work *dwork,
 882                                   unsigned long delay)
 883 {
 884         struct ieee80211_local *local = hw_to_local(hw);
 885
 886         if (!ieee80211_can_queue_work(local))
 887                 return;
 888
 889         queue_delayed_work(local->workqueue, dwork, delay);
 890 }
 891 EXPORT_SYMBOL(ieee80211_queue_delayed_work);
 892
 893 static void ieee80211_parse_extension_element(u32 *crc,
 894                                               const struct element *elem,
 895                                               struct ieee802_11_elems *elems)
 896 {
 897         const void *data = elem->data + 1;
 898         u8 len = elem->datalen - 1;
 899
 900         switch (elem->data[0]) {
 901         case WLAN_EID_EXT_HE_MU_EDCA:
 902                 if (len == sizeof(*elems->mu_edca_param_set)) {
 903                         elems->mu_edca_param_set = data;
 904                         if (crc)
 905                                 *crc = crc32_be(*crc, (void *)elem,
 906                                                 elem->datalen + 2);
 907                 }
 908                 break;
 909         case WLAN_EID_EXT_HE_CAPABILITY:
 910                 elems->he_cap = data;
 911                 elems->he_cap_len = len;
 912                 break;
 913         case WLAN_EID_EXT_HE_OPERATION:
 914                 if (len >= sizeof(*elems->he_operation) &&
 915                     len == ieee80211_he_oper_size(data) - 1) {
 916                         if (crc)
 917                                 *crc = crc32_be(*crc, (void *)elem,
 918                                                 elem->datalen + 2);
 919                         elems->he_operation = data;
 920                 }
 921                 break;
 922         case WLAN_EID_EXT_UORA:
 923                 if (len == 1)
 924                         elems->uora_element = data;
 925                 break;
 926         case WLAN_EID_EXT_MAX_CHANNEL_SWITCH_TIME:
 927                 if (len == 3)
 928                         elems->max_channel_switch_time = data;
 929                 break;
 930         case WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION:
 931                 if (len == sizeof(*elems->mbssid_config_ie))
 932                         elems->mbssid_config_ie = data;
 933                 break;
 934         case WLAN_EID_EXT_HE_SPR:
 935                 if (len >= sizeof(*elems->he_spr) &&
 936                     len >= ieee80211_he_spr_size(data))
 937                         elems->he_spr = data;
 938                 break;
 939         }
 940 }
 941
 942 static u32
 943 _ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
 944                             struct ieee802_11_elems *elems,
 945                             u64 filter, u32 crc,
 946                             const struct element *check_inherit)
 947 {
 948         const struct element *elem;
 949         bool calc_crc = filter != 0;
 950         DECLARE_BITMAP(seen_elems, 256);
 951         const u8 *ie;
 952
 953         bitmap_zero(seen_elems, 256);
 954
 955         for_each_element(elem, start, len) {
 956                 bool elem_parse_failed;
 957                 u8 id = elem->id;
 958                 u8 elen = elem->datalen;
 959                 const u8 *pos = elem->data;
 960
 961                 if (check_inherit &&
 962                     !cfg80211_is_element_inherited(elem,
 963                                                    check_inherit))
 964                         continue;
 965
 966                 switch (id) {
 967                 case WLAN_EID_SSID:
 968                 case WLAN_EID_SUPP_RATES:
 969                 case WLAN_EID_FH_PARAMS:
 970                 case WLAN_EID_DS_PARAMS:
 971                 case WLAN_EID_CF_PARAMS:
 972                 case WLAN_EID_TIM:
 973                 case WLAN_EID_IBSS_PARAMS:
 974                 case WLAN_EID_CHALLENGE:
 975                 case WLAN_EID_RSN:
 976                 case WLAN_EID_ERP_INFO:
 977                 case WLAN_EID_EXT_SUPP_RATES:
 978                 case WLAN_EID_HT_CAPABILITY:
 979                 case WLAN_EID_HT_OPERATION:
 980                 case WLAN_EID_VHT_CAPABILITY:
 981                 case WLAN_EID_VHT_OPERATION:
 982                 case WLAN_EID_MESH_ID:
 983                 case WLAN_EID_MESH_CONFIG:
 984                 case WLAN_EID_PEER_MGMT:
 985                 case WLAN_EID_PREQ:
 986                 case WLAN_EID_PREP:
 987                 case WLAN_EID_PERR:
 988                 case WLAN_EID_RANN:
 989                 case WLAN_EID_CHANNEL_SWITCH:
 990                 case WLAN_EID_EXT_CHANSWITCH_ANN:
 991                 case WLAN_EID_COUNTRY:
 992                 case WLAN_EID_PWR_CONSTRAINT:
 993                 case WLAN_EID_TIMEOUT_INTERVAL:
 994                 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
 995                 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
 996                 case WLAN_EID_CHAN_SWITCH_PARAM:
 997                 case WLAN_EID_EXT_CAPABILITY:
 998                 case WLAN_EID_CHAN_SWITCH_TIMING:
 999                 case WLAN_EID_LINK_ID:
1000                 case WLAN_EID_BSS_MAX_IDLE_PERIOD:
1001                 case WLAN_EID_RSNX:
1002                 /*
1003                  * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
1004                  * that if the content gets bigger it might be needed more than once
1005                  */
1006                         if (test_bit(id, seen_elems)) {
1007                                 elems->parse_error = true;
1008                                 continue;
1009                         }
1010                         break;
1011                 }
1012
1013                 if (calc_crc && id < 64 && (filter & (1ULL << id)))
1014                         crc = crc32_be(crc, pos - 2, elen + 2);
1015
1016                 elem_parse_failed = false;
1017
1018                 switch (id) {
1019                 case WLAN_EID_LINK_ID:
1020                         if (elen + 2 != sizeof(struct ieee80211_tdls_lnkie)) {
1021                                 elem_parse_failed = true;
1022                                 break;
1023                         }
1024                         elems->lnk_id = (void *)(pos - 2);
1025                         break;
1026                 case WLAN_EID_CHAN_SWITCH_TIMING:
1027                         if (elen != sizeof(struct ieee80211_ch_switch_timing)) {
1028                                 elem_parse_failed = true;
1029                                 break;
1030                         }
1031                         elems->ch_sw_timing = (void *)pos;
1032                         break;
1033                 case WLAN_EID_EXT_CAPABILITY:
1034                         elems->ext_capab = pos;
1035                         elems->ext_capab_len = elen;
1036                         break;
1037                 case WLAN_EID_SSID:
1038                         elems->ssid = pos;
1039                         elems->ssid_len = elen;
1040                         break;
1041                 case WLAN_EID_SUPP_RATES:
1042                         elems->supp_rates = pos;
1043                         elems->supp_rates_len = elen;
1044                         break;
1045                 case WLAN_EID_DS_PARAMS:
1046                         if (elen >= 1)
1047                                 elems->ds_params = pos;
1048                         else
1049                                 elem_parse_failed = true;
1050                         break;
1051                 case WLAN_EID_TIM:
1052                         if (elen >= sizeof(struct ieee80211_tim_ie)) {
1053                                 elems->tim = (void *)pos;
1054                                 elems->tim_len = elen;
1055                         } else
1056                                 elem_parse_failed = true;
1057                         break;
1058                 case WLAN_EID_CHALLENGE:
1059                         elems->challenge = pos;
1060                         elems->challenge_len = elen;
1061                         break;
1062                 case WLAN_EID_VENDOR_SPECIFIC:
1063                         if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
1064                             pos[2] == 0xf2) {
1065                                 /* Microsoft OUI (00:50:F2) */
1066
1067                                 if (calc_crc)
1068                                         crc = crc32_be(crc, pos - 2, elen + 2);
1069
1070                                 if (elen >= 5 && pos[3] == 2) {
1071                                         /* OUI Type 2 - WMM IE */
1072                                         if (pos[4] == 0) {
1073                                                 elems->wmm_info = pos;
1074                                                 elems->wmm_info_len = elen;
1075                                         } else if (pos[4] == 1) {
1076                                                 elems->wmm_param = pos;
1077                                                 elems->wmm_param_len = elen;
1078                                         }
1079                                 }
1080                         }
1081                         break;
1082                 case WLAN_EID_RSN:
1083                         elems->rsn = pos;
1084                         elems->rsn_len = elen;
1085                         break;
1086                 case WLAN_EID_ERP_INFO:
1087                         if (elen >= 1)
1088                                 elems->erp_info = pos;
1089                         else
1090                                 elem_parse_failed = true;
1091                         break;
1092                 case WLAN_EID_EXT_SUPP_RATES:
1093                         elems->ext_supp_rates = pos;
1094                         elems->ext_supp_rates_len = elen;
1095                         break;
1096                 case WLAN_EID_HT_CAPABILITY:
1097                         if (elen >= sizeof(struct ieee80211_ht_cap))
1098                                 elems->ht_cap_elem = (void *)pos;
1099                         else
1100                                 elem_parse_failed = true;
1101                         break;
1102                 case WLAN_EID_HT_OPERATION:
1103                         if (elen >= sizeof(struct ieee80211_ht_operation))
1104                                 elems->ht_operation = (void *)pos;
1105                         else
1106                                 elem_parse_failed = true;
1107                         break;
1108                 case WLAN_EID_VHT_CAPABILITY:
1109                         if (elen >= sizeof(struct ieee80211_vht_cap))
1110                                 elems->vht_cap_elem = (void *)pos;
1111                         else
1112                                 elem_parse_failed = true;
1113                         break;
1114                 case WLAN_EID_VHT_OPERATION:
1115                         if (elen >= sizeof(struct ieee80211_vht_operation)) {
1116                                 elems->vht_operation = (void *)pos;
1117                                 if (calc_crc)
1118                                         crc = crc32_be(crc, pos - 2, elen + 2);
1119                                 break;
1120                         }
1121                         elem_parse_failed = true;
1122                         break;
1123                 case WLAN_EID_OPMODE_NOTIF:
1124                         if (elen > 0) {
1125                                 elems->opmode_notif = pos;
1126                                 if (calc_crc)
1127                                         crc = crc32_be(crc, pos - 2, elen + 2);
1128                                 break;
1129                         }
1130                         elem_parse_failed = true;
1131                         break;
1132                 case WLAN_EID_MESH_ID:
1133                         elems->mesh_id = pos;
1134                         elems->mesh_id_len = elen;
1135                         break;
1136                 case WLAN_EID_MESH_CONFIG:
1137                         if (elen >= sizeof(struct ieee80211_meshconf_ie))
1138                                 elems->mesh_config = (void *)pos;
1139                         else
1140                                 elem_parse_failed = true;
1141                         break;
1142                 case WLAN_EID_PEER_MGMT:
1143                         elems->peering = pos;
1144                         elems->peering_len = elen;
1145                         break;
1146                 case WLAN_EID_MESH_AWAKE_WINDOW:
1147                         if (elen >= 2)
1148                                 elems->awake_window = (void *)pos;
1149                         break;
1150                 case WLAN_EID_PREQ:
1151                         elems->preq = pos;
1152                         elems->preq_len = elen;
1153                         break;
1154                 case WLAN_EID_PREP:
1155                         elems->prep = pos;
1156                         elems->prep_len = elen;
1157                         break;
1158                 case WLAN_EID_PERR:
1159                         elems->perr = pos;
1160                         elems->perr_len = elen;
1161                         break;
1162                 case WLAN_EID_RANN:
1163                         if (elen >= sizeof(struct ieee80211_rann_ie))
1164                                 elems->rann = (void *)pos;
1165                         else
1166                                 elem_parse_failed = true;
1167                         break;
1168                 case WLAN_EID_CHANNEL_SWITCH:
1169                         if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
1170                                 elem_parse_failed = true;
1171                                 break;
1172                         }
1173                         elems->ch_switch_ie = (void *)pos;
1174                         break;
1175                 case WLAN_EID_EXT_CHANSWITCH_ANN:
1176                         if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
1177                                 elem_parse_failed = true;
1178                                 break;
1179                         }
1180                         elems->ext_chansw_ie = (void *)pos;
1181                         break;
1182                 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
1183                         if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
1184                                 elem_parse_failed = true;
1185                                 break;
1186                         }
1187                         elems->sec_chan_offs = (void *)pos;
1188                         break;
1189                 case WLAN_EID_CHAN_SWITCH_PARAM:
1190                         if (elen !=
1191                             sizeof(*elems->mesh_chansw_params_ie)) {
1192                                 elem_parse_failed = true;
1193                                 break;
1194                         }
1195                         elems->mesh_chansw_params_ie = (void *)pos;
1196                         break;
1197                 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
1198                         if (!action ||
1199                             elen != sizeof(*elems->wide_bw_chansw_ie)) {
1200                                 elem_parse_failed = true;
1201                                 break;
1202                         }
1203                         elems->wide_bw_chansw_ie = (void *)pos;
1204                         break;
1205                 case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
1206                         if (action) {
1207                                 elem_parse_failed = true;
1208                                 break;
1209                         }
1210                         /*
1211                          * This is a bit tricky, but as we only care about
1212                          * the wide bandwidth channel switch element, so
1213                          * just parse it out manually.
1214                          */
1215                         ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
1216                                               pos, elen);
1217                         if (ie) {
1218                                 if (ie[1] == sizeof(*elems->wide_bw_chansw_ie))
1219                                         elems->wide_bw_chansw_ie =
1220                                                 (void *)(ie + 2);
1221                                 else
1222                                         elem_parse_failed = true;
1223                         }
1224                         break;
1225                 case WLAN_EID_COUNTRY:
1226                         elems->country_elem = pos;
1227                         elems->country_elem_len = elen;
1228                         break;
1229                 case WLAN_EID_PWR_CONSTRAINT:
1230                         if (elen != 1) {
1231                                 elem_parse_failed = true;
1232                                 break;
1233                         }
1234                         elems->pwr_constr_elem = pos;
1235                         break;
1236                 case WLAN_EID_CISCO_VENDOR_SPECIFIC:
1237                         /* Lots of different options exist, but we only care
1238                          * about the Dynamic Transmit Power Control element.
1239                          * First check for the Cisco OUI, then for the DTPC
1240                          * tag (0x00).
1241                          */
1242                         if (elen < 4) {
1243                                 elem_parse_failed = true;
1244                                 break;
1245                         }
1246
1247                         if (pos[0] != 0x00 || pos[1] != 0x40 ||
1248                             pos[2] != 0x96 || pos[3] != 0x00)
1249                                 break;
1250
1251                         if (elen != 6) {
1252                                 elem_parse_failed = true;
1253                                 break;
1254                         }
1255
1256                         if (calc_crc)
1257                                 crc = crc32_be(crc, pos - 2, elen + 2);
1258
1259                         elems->cisco_dtpc_elem = pos;
1260                         break;
1261                 case WLAN_EID_ADDBA_EXT:
1262                         if (elen != sizeof(struct ieee80211_addba_ext_ie)) {
1263                                 elem_parse_failed = true;
1264                                 break;
1265                         }
1266                         elems->addba_ext_ie = (void *)pos;
1267                         break;
1268                 case WLAN_EID_TIMEOUT_INTERVAL:
1269                         if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
1270                                 elems->timeout_int = (void *)pos;
1271                         else
1272                                 elem_parse_failed = true;
1273                         break;
1274                 case WLAN_EID_BSS_MAX_IDLE_PERIOD:
1275                         if (elen >= sizeof(*elems->max_idle_period_ie))
1276                                 elems->max_idle_period_ie = (void *)pos;
1277                         break;
1278                 case WLAN_EID_RSNX:
1279                         elems->rsnx = pos;
1280                         elems->rsnx_len = elen;
1281                         break;
1282                 case WLAN_EID_EXTENSION:
1283                         ieee80211_parse_extension_element(calc_crc ?
1284                                                                 &crc : NULL,
1285                                                           elem, elems);
1286                         break;
1287                 default:
1288                         break;
1289                 }
1290
1291                 if (elem_parse_failed)
1292                         elems->parse_error = true;
1293                 else
1294                         __set_bit(id, seen_elems);
1295         }
1296
1297         if (!for_each_element_completed(elem, start, len))
1298                 elems->parse_error = true;
1299
1300         return crc;
1301 }
1302
1303 static size_t ieee802_11_find_bssid_profile(const u8 *start, size_t len,
1304                                             struct ieee802_11_elems *elems,
1305                                             u8 *transmitter_bssid,
1306                                             u8 *bss_bssid,
1307                                             u8 *nontransmitted_profile)
1308 {
1309         const struct element *elem, *sub;
1310         size_t profile_len = 0;
1311         bool found = false;
1312
1313         if (!bss_bssid || !transmitter_bssid)
1314                 return profile_len;
1315
1316         for_each_element_id(elem, WLAN_EID_MULTIPLE_BSSID, start, len) {
1317                 if (elem->datalen < 2)
1318                         continue;
1319
1320                 for_each_element(sub, elem->data + 1, elem->datalen - 1) {
1321                         u8 new_bssid[ETH_ALEN];
1322                         const u8 *index;
1323
1324                         if (sub->id != 0 || sub->datalen < 4) {
1325                                 /* not a valid BSS profile */
1326                                 continue;
1327                         }
1328
1329                         if (sub->data[0] != WLAN_EID_NON_TX_BSSID_CAP ||
1330                             sub->data[1] != 2) {
1331                                 /* The first element of the
1332                                  * Nontransmitted BSSID Profile is not
1333                                  * the Nontransmitted BSSID Capability
1334                                  * element.
1335                                  */
1336                                 continue;
1337                         }
1338
1339                         memset(nontransmitted_profile, 0, len);
1340                         profile_len = cfg80211_merge_profile(start, len,
1341                                                              elem,
1342                                                              sub,
1343                                                              nontransmitted_profile,
1344                                                              len);
1345
1346                         /* found a Nontransmitted BSSID Profile */
1347                         index = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX,
1348                                                  nontransmitted_profile,
1349                                                  profile_len);
1350                         if (!index || index[1] < 1 || index[2] == 0) {
1351                                 /* Invalid MBSSID Index element */
1352                                 continue;
1353                         }
1354
1355                         cfg80211_gen_new_bssid(transmitter_bssid,
1356                                                elem->data[0],
1357                                                index[2],
1358                                                new_bssid);
1359                         if (ether_addr_equal(new_bssid, bss_bssid)) {
1360                                 found = true;
1361                                 elems->bssid_index_len = index[1];
1362                                 elems->bssid_index = (void *)&index[2];
1363                                 break;
1364                         }
1365                 }
1366         }
1367
1368         return found ? profile_len : 0;
1369 }
1370
1371 u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
1372                                struct ieee802_11_elems *elems,
1373                                u64 filter, u32 crc, u8 *transmitter_bssid,
1374                                u8 *bss_bssid)
1375 {
1376         const struct element *non_inherit = NULL;
1377         u8 *nontransmitted_profile;
1378         int nontransmitted_profile_len = 0;
1379
1380         memset(elems, 0, sizeof(*elems));
1381         elems->ie_start = start;
1382         elems->total_len = len;
1383
1384         nontransmitted_profile = kmalloc(len, GFP_ATOMIC);
1385         if (nontransmitted_profile) {
1386                 nontransmitted_profile_len =
1387                         ieee802_11_find_bssid_profile(start, len, elems,
1388                                                       transmitter_bssid,
1389                                                       bss_bssid,
1390                                                       nontransmitted_profile);
1391                 non_inherit =
1392                         cfg80211_find_ext_elem(WLAN_EID_EXT_NON_INHERITANCE,
1393                                                nontransmitted_profile,
1394                                                nontransmitted_profile_len);
1395         }
1396
1397         crc = _ieee802_11_parse_elems_crc(start, len, action, elems, filter,
1398                                           crc, non_inherit);
1399
1400         /* Override with nontransmitted profile, if found */
1401         if (nontransmitted_profile_len)
1402                 _ieee802_11_parse_elems_crc(nontransmitted_profile,
1403                                             nontransmitted_profile_len,
1404                                             action, elems, 0, 0, NULL);
1405
1406         if (elems->tim && !elems->parse_error) {
1407                 const struct ieee80211_tim_ie *tim_ie = elems->tim;
1408
1409                 elems->dtim_period = tim_ie->dtim_period;
1410                 elems->dtim_count = tim_ie->dtim_count;
1411         }
1412
1413         /* Override DTIM period and count if needed */
1414         if (elems->bssid_index &&
1415             elems->bssid_index_len >=
1416             offsetofend(struct ieee80211_bssid_index, dtim_period))
1417                 elems->dtim_period = elems->bssid_index->dtim_period;
1418
1419         if (elems->bssid_index &&
1420             elems->bssid_index_len >=
1421             offsetofend(struct ieee80211_bssid_index, dtim_count))
1422                 elems->dtim_count = elems->bssid_index->dtim_count;
1423
1424         kfree(nontransmitted_profile);
1425
1426         return crc;
1427 }
1428
1429 void ieee80211_regulatory_limit_wmm_params(struct ieee80211_sub_if_data *sdata,
1430                                            struct ieee80211_tx_queue_params
1431                                            *qparam, int ac)
1432 {
1433         struct ieee80211_chanctx_conf *chanctx_conf;
1434         const struct ieee80211_reg_rule *rrule;
1435         const struct ieee80211_wmm_ac *wmm_ac;
1436         u16 center_freq = 0;
1437
1438         if (sdata->vif.type != NL80211_IFTYPE_AP &&
1439             sdata->vif.type != NL80211_IFTYPE_STATION)
1440                 return;
1441
1442         rcu_read_lock();
1443         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1444         if (chanctx_conf)
1445                 center_freq = chanctx_conf->def.chan->center_freq;
1446
1447         if (!center_freq) {
1448                 rcu_read_unlock();
1449                 return;
1450         }
1451
1452         rrule = freq_reg_info(sdata->wdev.wiphy, MHZ_TO_KHZ(center_freq));
1453
1454         if (IS_ERR_OR_NULL(rrule) || !rrule->has_wmm) {
1455                 rcu_read_unlock();
1456                 return;
1457         }
1458
1459         if (sdata->vif.type == NL80211_IFTYPE_AP)
1460                 wmm_ac = &rrule->wmm_rule.ap[ac];
1461         else
1462                 wmm_ac = &rrule->wmm_rule.client[ac];
1463         qparam->cw_min = max_t(u16, qparam->cw_min, wmm_ac->cw_min);
1464         qparam->cw_max = max_t(u16, qparam->cw_max, wmm_ac->cw_max);
1465         qparam->aifs = max_t(u8, qparam->aifs, wmm_ac->aifsn);
1466         qparam->txop = min_t(u16, qparam->txop, wmm_ac->cot / 32);
1467         rcu_read_unlock();
1468 }
1469
1470 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
1471                                bool bss_notify, bool enable_qos)
1472 {
1473         struct ieee80211_local *local = sdata->local;
1474         struct ieee80211_tx_queue_params qparam;
1475         struct ieee80211_chanctx_conf *chanctx_conf;
1476         int ac;
1477         bool use_11b;
1478         bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */
1479         int aCWmin, aCWmax;
1480
1481         if (!local->ops->conf_tx)
1482                 return;
1483
1484         if (local->hw.queues < IEEE80211_NUM_ACS)
1485                 return;
1486
1487         memset(&qparam, 0, sizeof(qparam));
1488
1489         rcu_read_lock();
1490         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1491         use_11b = (chanctx_conf &&
1492                    chanctx_conf->def.chan->band == NL80211_BAND_2GHZ) &&
1493                  !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
1494         rcu_read_unlock();
1495
1496         is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB);
1497
1498         /* Set defaults according to 802.11-2007 Table 7-37 */
1499         aCWmax = 1023;
1500         if (use_11b)
1501                 aCWmin = 31;
1502         else
1503                 aCWmin = 15;
1504
1505         /* Confiure old 802.11b/g medium access rules. */
1506         qparam.cw_max = aCWmax;
1507         qparam.cw_min = aCWmin;
1508         qparam.txop = 0;
1509         qparam.aifs = 2;
1510
1511         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1512                 /* Update if QoS is enabled. */
1513                 if (enable_qos) {
1514                         switch (ac) {
1515                         case IEEE80211_AC_BK:
1516                                 qparam.cw_max = aCWmax;
1517                                 qparam.cw_min = aCWmin;
1518                                 qparam.txop = 0;
1519                                 if (is_ocb)
1520                                         qparam.aifs = 9;
1521                                 else
1522                                         qparam.aifs = 7;
1523                                 break;
1524                         /* never happens but let's not leave undefined */
1525                         default:
1526                         case IEEE80211_AC_BE:
1527                                 qparam.cw_max = aCWmax;
1528                                 qparam.cw_min = aCWmin;
1529                                 qparam.txop = 0;
1530                                 if (is_ocb)
1531                                         qparam.aifs = 6;
1532                                 else
1533                                         qparam.aifs = 3;
1534                                 break;
1535                         case IEEE80211_AC_VI:
1536                                 qparam.cw_max = aCWmin;
1537                                 qparam.cw_min = (aCWmin + 1) / 2 - 1;
1538                                 if (is_ocb)
1539                                         qparam.txop = 0;
1540                                 else if (use_11b)
1541                                         qparam.txop = 6016/32;
1542                                 else
1543                                         qparam.txop = 3008/32;
1544
1545                                 if (is_ocb)
1546                                         qparam.aifs = 3;
1547                                 else
1548                                         qparam.aifs = 2;
1549                                 break;
1550                         case IEEE80211_AC_VO:
1551                                 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1552                                 qparam.cw_min = (aCWmin + 1) / 4 - 1;
1553                                 if (is_ocb)
1554                                         qparam.txop = 0;
1555                                 else if (use_11b)
1556                                         qparam.txop = 3264/32;
1557                                 else
1558                                         qparam.txop = 1504/32;
1559                                 qparam.aifs = 2;
1560                                 break;
1561                         }
1562                 }
1563                 ieee80211_regulatory_limit_wmm_params(sdata, &qparam, ac);
1564
1565                 qparam.uapsd = false;
1566
1567                 sdata->tx_conf[ac] = qparam;
1568                 drv_conf_tx(local, sdata, ac, &qparam);
1569         }
1570
1571         if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1572             sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
1573             sdata->vif.type != NL80211_IFTYPE_NAN) {
1574                 sdata->vif.bss_conf.qos = enable_qos;
1575                 if (bss_notify)
1576                         ieee80211_bss_info_change_notify(sdata,
1577                                                          BSS_CHANGED_QOS);
1578         }
1579 }
1580
1581 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1582                          u16 transaction, u16 auth_alg, u16 status,
1583                          const u8 *extra, size_t extra_len, const u8 *da,
1584                          const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1585                          u32 tx_flags)
1586 {
1587         struct ieee80211_local *local = sdata->local;
1588         struct sk_buff *skb;
1589         struct ieee80211_mgmt *mgmt;
1590         int err;
1591
1592         /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
1593         skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN +
1594                             24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN);
1595         if (!skb)
1596                 return;
1597
1598         skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN);
1599
1600         mgmt = skb_put_zero(skb, 24 + 6);
1601         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1602                                           IEEE80211_STYPE_AUTH);
1603         memcpy(mgmt->da, da, ETH_ALEN);
1604         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1605         memcpy(mgmt->bssid, bssid, ETH_ALEN);
1606         mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1607         mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
1608         mgmt->u.auth.status_code = cpu_to_le16(status);
1609         if (extra)
1610                 skb_put_data(skb, extra, extra_len);
1611
1612         if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1613                 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1614                 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1615                 WARN_ON(err);
1616         }
1617
1618         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1619                                         tx_flags;
1620         ieee80211_tx_skb(sdata, skb);
1621 }
1622
1623 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1624                                     const u8 *da, const u8 *bssid,
1625                                     u16 stype, u16 reason,
1626                                     bool send_frame, u8 *frame_buf)
1627 {
1628         struct ieee80211_local *local = sdata->local;
1629         struct sk_buff *skb;
1630         struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1631
1632         /* build frame */
1633         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1634         mgmt->duration = 0; /* initialize only */
1635         mgmt->seq_ctrl = 0; /* initialize only */
1636         memcpy(mgmt->da, da, ETH_ALEN);
1637         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1638         memcpy(mgmt->bssid, bssid, ETH_ALEN);
1639         /* u.deauth.reason_code == u.disassoc.reason_code */
1640         mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1641
1642         if (send_frame) {
1643                 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1644                                     IEEE80211_DEAUTH_FRAME_LEN);
1645                 if (!skb)
1646                         return;
1647
1648                 skb_reserve(skb, local->hw.extra_tx_headroom);
1649
1650                 /* copy in frame */
1651                 skb_put_data(skb, mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1652
1653                 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1654                     !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1655                         IEEE80211_SKB_CB(skb)->flags |=
1656                                 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1657
1658                 ieee80211_tx_skb(sdata, skb);
1659         }
1660 }
1661
1662 static int ieee80211_build_preq_ies_band(struct ieee80211_local *local,
1663                                          u8 *buffer, size_t buffer_len,
1664                                          const u8 *ie, size_t ie_len,
1665                                          enum nl80211_band band,
1666                                          u32 rate_mask,
1667                                          struct cfg80211_chan_def *chandef,
1668                                          size_t *offset, u32 flags)
1669 {
1670         struct ieee80211_supported_band *sband;
1671         const struct ieee80211_sta_he_cap *he_cap;
1672         u8 *pos = buffer, *end = buffer + buffer_len;
1673         size_t noffset;
1674         int supp_rates_len, i;
1675         u8 rates[32];
1676         int num_rates;
1677         int ext_rates_len;
1678         int shift;
1679         u32 rate_flags;
1680         bool have_80mhz = false;
1681
1682         *offset = 0;
1683
1684         sband = local->hw.wiphy->bands[band];
1685         if (WARN_ON_ONCE(!sband))
1686                 return 0;
1687
1688         rate_flags = ieee80211_chandef_rate_flags(chandef);
1689         shift = ieee80211_chandef_get_shift(chandef);
1690
1691         num_rates = 0;
1692         for (i = 0; i < sband->n_bitrates; i++) {
1693                 if ((BIT(i) & rate_mask) == 0)
1694                         continue; /* skip rate */
1695                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1696                         continue;
1697
1698                 rates[num_rates++] =
1699                         (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
1700                                           (1 << shift) * 5);
1701         }
1702
1703         supp_rates_len = min_t(int, num_rates, 8);
1704
1705         if (end - pos < 2 + supp_rates_len)
1706                 goto out_err;
1707         *pos++ = WLAN_EID_SUPP_RATES;
1708         *pos++ = supp_rates_len;
1709         memcpy(pos, rates, supp_rates_len);
1710         pos += supp_rates_len;
1711
1712         /* insert "request information" if in custom IEs */
1713         if (ie && ie_len) {
1714                 static const u8 before_extrates[] = {
1715                         WLAN_EID_SSID,
1716                         WLAN_EID_SUPP_RATES,
1717                         WLAN_EID_REQUEST,
1718                 };
1719                 noffset = ieee80211_ie_split(ie, ie_len,
1720                                              before_extrates,
1721                                              ARRAY_SIZE(before_extrates),
1722                                              *offset);
1723                 if (end - pos < noffset - *offset)
1724                         goto out_err;
1725                 memcpy(pos, ie + *offset, noffset - *offset);
1726                 pos += noffset - *offset;
1727                 *offset = noffset;
1728         }
1729
1730         ext_rates_len = num_rates - supp_rates_len;
1731         if (ext_rates_len > 0) {
1732                 if (end - pos < 2 + ext_rates_len)
1733                         goto out_err;
1734                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1735                 *pos++ = ext_rates_len;
1736                 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1737                 pos += ext_rates_len;
1738         }
1739
1740         if (chandef->chan && sband->band == NL80211_BAND_2GHZ) {
1741                 if (end - pos < 3)
1742                         goto out_err;
1743                 *pos++ = WLAN_EID_DS_PARAMS;
1744                 *pos++ = 1;
1745                 *pos++ = ieee80211_frequency_to_channel(
1746                                 chandef->chan->center_freq);
1747         }
1748
1749         if (flags & IEEE80211_PROBE_FLAG_MIN_CONTENT)
1750                 goto done;
1751
1752         /* insert custom IEs that go before HT */
1753         if (ie && ie_len) {
1754                 static const u8 before_ht[] = {
1755                         /*
1756                          * no need to list the ones split off already
1757                          * (or generated here)
1758                          */
1759                         WLAN_EID_DS_PARAMS,
1760                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1761                 };
1762                 noffset = ieee80211_ie_split(ie, ie_len,
1763                                              before_ht, ARRAY_SIZE(before_ht),
1764                                              *offset);
1765                 if (end - pos < noffset - *offset)
1766                         goto out_err;
1767                 memcpy(pos, ie + *offset, noffset - *offset);
1768                 pos += noffset - *offset;
1769                 *offset = noffset;
1770         }
1771
1772         if (sband->ht_cap.ht_supported) {
1773                 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1774                         goto out_err;
1775                 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1776                                                 sband->ht_cap.cap);
1777         }
1778
1779         /* insert custom IEs that go before VHT */
1780         if (ie && ie_len) {
1781                 static const u8 before_vht[] = {
1782                         /*
1783                          * no need to list the ones split off already
1784                          * (or generated here)
1785                          */
1786                         WLAN_EID_BSS_COEX_2040,
1787                         WLAN_EID_EXT_CAPABILITY,
1788                         WLAN_EID_SSID_LIST,
1789                         WLAN_EID_CHANNEL_USAGE,
1790                         WLAN_EID_INTERWORKING,
1791                         WLAN_EID_MESH_ID,
1792                         /* 60 GHz (Multi-band, DMG, MMS) can't happen */
1793                 };
1794                 noffset = ieee80211_ie_split(ie, ie_len,
1795                                              before_vht, ARRAY_SIZE(before_vht),
1796                                              *offset);
1797                 if (end - pos < noffset - *offset)
1798                         goto out_err;
1799                 memcpy(pos, ie + *offset, noffset - *offset);
1800                 pos += noffset - *offset;
1801                 *offset = noffset;
1802         }
1803
1804         /* Check if any channel in this sband supports at least 80 MHz */
1805         for (i = 0; i < sband->n_channels; i++) {
1806                 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
1807                                                 IEEE80211_CHAN_NO_80MHZ))
1808                         continue;
1809
1810                 have_80mhz = true;
1811                 break;
1812         }
1813
1814         if (sband->vht_cap.vht_supported && have_80mhz) {
1815                 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1816                         goto out_err;
1817                 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1818                                                  sband->vht_cap.cap);
1819         }
1820
1821         /* insert custom IEs that go before HE */
1822         if (ie && ie_len) {
1823                 static const u8 before_he[] = {
1824                         /*
1825                          * no need to list the ones split off before VHT
1826                          * or generated here
1827                          */
1828                         WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_REQ_PARAMS,
1829                         WLAN_EID_AP_CSN,
1830                         /* TODO: add 11ah/11aj/11ak elements */
1831                 };
1832                 noffset = ieee80211_ie_split(ie, ie_len,
1833                                              before_he, ARRAY_SIZE(before_he),
1834                                              *offset);
1835                 if (end - pos < noffset - *offset)
1836                         goto out_err;
1837                 memcpy(pos, ie + *offset, noffset - *offset);
1838                 pos += noffset - *offset;
1839                 *offset = noffset;
1840         }
1841
1842         he_cap = ieee80211_get_he_sta_cap(sband);
1843         if (he_cap) {
1844                 pos = ieee80211_ie_build_he_cap(pos, he_cap, end);
1845                 if (!pos)
1846                         goto out_err;
1847         }
1848
1849         /*
1850          * If adding more here, adjust code in main.c
1851          * that calculates local->scan_ies_len.
1852          */
1853
1854         return pos - buffer;
1855  out_err:
1856         WARN_ONCE(1, "not enough space for preq IEs\n");
1857  done:
1858         return pos - buffer;
1859 }
1860
1861 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1862                              size_t buffer_len,
1863                              struct ieee80211_scan_ies *ie_desc,
1864                              const u8 *ie, size_t ie_len,
1865                              u8 bands_used, u32 *rate_masks,
1866                              struct cfg80211_chan_def *chandef,
1867                              u32 flags)
1868 {
1869         size_t pos = 0, old_pos = 0, custom_ie_offset = 0;
1870         int i;
1871
1872         memset(ie_desc, 0, sizeof(*ie_desc));
1873
1874         for (i = 0; i < NUM_NL80211_BANDS; i++) {
1875                 if (bands_used & BIT(i)) {
1876                         pos += ieee80211_build_preq_ies_band(local,
1877                                                              buffer + pos,
1878                                                              buffer_len - pos,
1879                                                              ie, ie_len, i,
1880                                                              rate_masks[i],
1881                                                              chandef,
1882                                                              &custom_ie_offset,
1883                                                              flags);
1884                         ie_desc->ies[i] = buffer + old_pos;
1885                         ie_desc->len[i] = pos - old_pos;
1886                         old_pos = pos;
1887                 }
1888         }
1889
1890         /* add any remaining custom IEs */
1891         if (ie && ie_len) {
1892                 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset,
1893                               "not enough space for preq custom IEs\n"))
1894                         return pos;
1895                 memcpy(buffer + pos, ie + custom_ie_offset,
1896                        ie_len - custom_ie_offset);
1897                 ie_desc->common_ies = buffer + pos;
1898                 ie_desc->common_ie_len = ie_len - custom_ie_offset;
1899                 pos += ie_len - custom_ie_offset;
1900         }
1901
1902         return pos;
1903 };
1904
1905 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
1906                                           const u8 *src, const u8 *dst,
1907                                           u32 ratemask,
1908                                           struct ieee80211_channel *chan,
1909                                           const u8 *ssid, size_t ssid_len,
1910                                           const u8 *ie, size_t ie_len,
1911                                           u32 flags)
1912 {
1913         struct ieee80211_local *local = sdata->local;
1914         struct cfg80211_chan_def chandef;
1915         struct sk_buff *skb;
1916         struct ieee80211_mgmt *mgmt;
1917         int ies_len;
1918         u32 rate_masks[NUM_NL80211_BANDS] = {};
1919         struct ieee80211_scan_ies dummy_ie_desc;
1920
1921         /*
1922          * Do not send DS Channel parameter for directed probe requests
1923          * in order to maximize the chance that we get a response.  Some
1924          * badly-behaved APs don't respond when this parameter is included.
1925          */
1926         chandef.width = sdata->vif.bss_conf.chandef.width;
1927         if (flags & IEEE80211_PROBE_FLAG_DIRECTED)
1928                 chandef.chan = NULL;
1929         else
1930                 chandef.chan = chan;
1931
1932         skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len,
1933                                      100 + ie_len);
1934         if (!skb)
1935                 return NULL;
1936
1937         rate_masks[chan->band] = ratemask;
1938         ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb),
1939                                            skb_tailroom(skb), &dummy_ie_desc,
1940                                            ie, ie_len, BIT(chan->band),
1941                                            rate_masks, &chandef, flags);
1942         skb_put(skb, ies_len);
1943
1944         if (dst) {
1945                 mgmt = (struct ieee80211_mgmt *) skb->data;
1946                 memcpy(mgmt->da, dst, ETH_ALEN);
1947                 memcpy(mgmt->bssid, dst, ETH_ALEN);
1948         }
1949
1950         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1951
1952         return skb;
1953 }
1954
1955 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
1956                             struct ieee802_11_elems *elems,
1957                             enum nl80211_band band, u32 *basic_rates)
1958 {
1959         struct ieee80211_supported_band *sband;
1960         size_t num_rates;
1961         u32 supp_rates, rate_flags;
1962         int i, j, shift;
1963
1964         sband = sdata->local->hw.wiphy->bands[band];
1965         if (WARN_ON(!sband))
1966                 return 1;
1967
1968         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
1969         shift = ieee80211_vif_get_shift(&sdata->vif);
1970
1971         num_rates = sband->n_bitrates;
1972         supp_rates = 0;
1973         for (i = 0; i < elems->supp_rates_len +
1974                      elems->ext_supp_rates_len; i++) {
1975                 u8 rate = 0;
1976                 int own_rate;
1977                 bool is_basic;
1978                 if (i < elems->supp_rates_len)
1979                         rate = elems->supp_rates[i];
1980                 else if (elems->ext_supp_rates)
1981                         rate = elems->ext_supp_rates
1982                                 [i - elems->supp_rates_len];
1983                 own_rate = 5 * (rate & 0x7f);
1984                 is_basic = !!(rate & 0x80);
1985
1986                 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1987                         continue;
1988
1989                 for (j = 0; j < num_rates; j++) {
1990                         int brate;
1991                         if ((rate_flags & sband->bitrates[j].flags)
1992                             != rate_flags)
1993                                 continue;
1994
1995                         brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
1996                                              1 << shift);
1997
1998                         if (brate == own_rate) {
1999                                 supp_rates |= BIT(j);
2000                                 if (basic_rates && is_basic)
2001                                         *basic_rates |= BIT(j);
2002                         }
2003                 }
2004         }
2005         return supp_rates;
2006 }
2007
2008 void ieee80211_stop_device(struct ieee80211_local *local)
2009 {
2010         ieee80211_led_radio(local, false);
2011         ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
2012
2013         cancel_work_sync(&local->reconfig_filter);
2014
2015         flush_workqueue(local->workqueue);
2016         drv_stop(local);
2017 }
2018
2019 static void ieee80211_flush_completed_scan(struct ieee80211_local *local,
2020                                            bool aborted)
2021 {
2022         /* It's possible that we don't handle the scan completion in
2023          * time during suspend, so if it's still marked as completed
2024          * here, queue the work and flush it to clean things up.
2025          * Instead of calling the worker function directly here, we
2026          * really queue it to avoid potential races with other flows
2027          * scheduling the same work.
2028          */
2029         if (test_bit(SCAN_COMPLETED, &local->scanning)) {
2030                 /* If coming from reconfiguration failure, abort the scan so
2031                  * we don't attempt to continue a partial HW scan - which is
2032                  * possible otherwise if (e.g.) the 2.4 GHz portion was the
2033                  * completed scan, and a 5 GHz portion is still pending.
2034                  */
2035                 if (aborted)
2036                         set_bit(SCAN_ABORTED, &local->scanning);
2037                 ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0);
2038                 flush_delayed_work(&local->scan_work);
2039         }
2040 }
2041
2042 static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
2043 {
2044         struct ieee80211_sub_if_data *sdata;
2045         struct ieee80211_chanctx *ctx;
2046
2047         /*
2048          * We get here if during resume the device can't be restarted properly.
2049          * We might also get here if this happens during HW reset, which is a
2050          * slightly different situation and we need to drop all connections in
2051          * the latter case.
2052          *
2053          * Ask cfg80211 to turn off all interfaces, this will result in more
2054          * warnings but at least we'll then get into a clean stopped state.
2055          */
2056
2057         local->resuming = false;
2058         local->suspended = false;
2059         local->in_reconfig = false;
2060
2061         ieee80211_flush_completed_scan(local, true);
2062
2063         /* scheduled scan clearly can't be running any more, but tell
2064          * cfg80211 and clear local state
2065          */
2066         ieee80211_sched_scan_end(local);
2067
2068         list_for_each_entry(sdata, &local->interfaces, list)
2069                 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
2070
2071         /* Mark channel contexts as not being in the driver any more to avoid
2072          * removing them from the driver during the shutdown process...
2073          */
2074         mutex_lock(&local->chanctx_mtx);
2075         list_for_each_entry(ctx, &local->chanctx_list, list)
2076                 ctx->driver_present = false;
2077         mutex_unlock(&local->chanctx_mtx);
2078
2079         cfg80211_shutdown_all_interfaces(local->hw.wiphy);
2080 }
2081
2082 static void ieee80211_assign_chanctx(struct ieee80211_local *local,
2083                                      struct ieee80211_sub_if_data *sdata)
2084 {
2085         struct ieee80211_chanctx_conf *conf;
2086         struct ieee80211_chanctx *ctx;
2087
2088         if (!local->use_chanctx)
2089                 return;
2090
2091         mutex_lock(&local->chanctx_mtx);
2092         conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2093                                          lockdep_is_held(&local->chanctx_mtx));
2094         if (conf) {
2095                 ctx = container_of(conf, struct ieee80211_chanctx, conf);
2096                 drv_assign_vif_chanctx(local, sdata, ctx);
2097         }
2098         mutex_unlock(&local->chanctx_mtx);
2099 }
2100
2101 static void ieee80211_reconfig_stations(struct ieee80211_sub_if_data *sdata)
2102 {
2103         struct ieee80211_local *local = sdata->local;
2104         struct sta_info *sta;
2105
2106         /* add STAs back */
2107         mutex_lock(&local->sta_mtx);
2108         list_for_each_entry(sta, &local->sta_list, list) {
2109                 enum ieee80211_sta_state state;
2110
2111                 if (!sta->uploaded || sta->sdata != sdata)
2112                         continue;
2113
2114                 for (state = IEEE80211_STA_NOTEXIST;
2115                      state < sta->sta_state; state++)
2116                         WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2117                                               state + 1));
2118         }
2119         mutex_unlock(&local->sta_mtx);
2120 }
2121
2122 static int ieee80211_reconfig_nan(struct ieee80211_sub_if_data *sdata)
2123 {
2124         struct cfg80211_nan_func *func, **funcs;
2125         int res, id, i = 0;
2126
2127         res = drv_start_nan(sdata->local, sdata,
2128                             &sdata->u.nan.conf);
2129         if (WARN_ON(res))
2130                 return res;
2131
2132         funcs = kcalloc(sdata->local->hw.max_nan_de_entries + 1,
2133                         sizeof(*funcs),
2134                         GFP_KERNEL);
2135         if (!funcs)
2136                 return -ENOMEM;
2137
2138         /* Add all the functions:
2139          * This is a little bit ugly. We need to call a potentially sleeping
2140          * callback for each NAN function, so we can't hold the spinlock.
2141          */
2142         spin_lock_bh(&sdata->u.nan.func_lock);
2143
2144         idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, id)
2145                 funcs[i++] = func;
2146
2147         spin_unlock_bh(&sdata->u.nan.func_lock);
2148
2149         for (i = 0; funcs[i]; i++) {
2150                 res = drv_add_nan_func(sdata->local, sdata, funcs[i]);
2151                 if (WARN_ON(res))
2152                         ieee80211_nan_func_terminated(&sdata->vif,
2153                                                       funcs[i]->instance_id,
2154                                                       NL80211_NAN_FUNC_TERM_REASON_ERROR,
2155                                                       GFP_KERNEL);
2156         }
2157
2158         kfree(funcs);
2159
2160         return 0;
2161 }
2162
2163 int ieee80211_reconfig(struct ieee80211_local *local)
2164 {
2165         struct ieee80211_hw *hw = &local->hw;
2166         struct ieee80211_sub_if_data *sdata;
2167         struct ieee80211_chanctx *ctx;
2168         struct sta_info *sta;
2169         int res, i;
2170         bool reconfig_due_to_wowlan = false;
2171         struct ieee80211_sub_if_data *sched_scan_sdata;
2172         struct cfg80211_sched_scan_request *sched_scan_req;
2173         bool sched_scan_stopped = false;
2174         bool suspended = local->suspended;
2175
2176         /* nothing to do if HW shouldn't run */
2177         if (!local->open_count)
2178                 goto wake_up;
2179
2180 #ifdef CONFIG_PM
2181         if (suspended)
2182                 local->resuming = true;
2183
2184         if (local->wowlan) {
2185                 /*
2186                  * In the wowlan case, both mac80211 and the device
2187                  * are functional when the resume op is called, so
2188                  * clear local->suspended so the device could operate
2189                  * normally (e.g. pass rx frames).
2190                  */
2191                 local->suspended = false;
2192                 res = drv_resume(local);
2193                 local->wowlan = false;
2194                 if (res < 0) {
2195                         local->resuming = false;
2196                         return res;
2197                 }
2198                 if (res == 0)
2199                         goto wake_up;
2200                 WARN_ON(res > 1);
2201                 /*
2202                  * res is 1, which means the driver requested
2203                  * to go through a regular reset on wakeup.
2204                  * restore local->suspended in this case.
2205                  */
2206                 reconfig_due_to_wowlan = true;
2207                 local->suspended = true;
2208         }
2209 #endif
2210
2211         /*
2212          * In case of hw_restart during suspend (without wowlan),
2213          * cancel restart work, as we are reconfiguring the device
2214          * anyway.
2215          * Note that restart_work is scheduled on a frozen workqueue,
2216          * so we can't deadlock in this case.
2217          */
2218         if (suspended && local->in_reconfig && !reconfig_due_to_wowlan)
2219                 cancel_work_sync(&local->restart_work);
2220
2221         local->started = false;
2222
2223         /*
2224          * Upon resume hardware can sometimes be goofy due to
2225          * various platform / driver / bus issues, so restarting
2226          * the device may at times not work immediately. Propagate
2227          * the error.
2228          */
2229         res = drv_start(local);
2230         if (res) {
2231                 if (suspended)
2232                         WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
2233                 else
2234                         WARN(1, "Hardware became unavailable during restart.\n");
2235                 ieee80211_handle_reconfig_failure(local);
2236                 return res;
2237         }
2238
2239         /* setup fragmentation threshold */
2240         drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
2241
2242         /* setup RTS threshold */
2243         drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
2244
2245         /* reset coverage class */
2246         drv_set_coverage_class(local, hw->wiphy->coverage_class);
2247
2248         ieee80211_led_radio(local, true);
2249         ieee80211_mod_tpt_led_trig(local,
2250                                    IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
2251
2252         /* add interfaces */
2253         sdata = rtnl_dereference(local->monitor_sdata);
2254         if (sdata) {
2255                 /* in HW restart it exists already */
2256                 WARN_ON(local->resuming);
2257                 res = drv_add_interface(local, sdata);
2258                 if (WARN_ON(res)) {
2259                         RCU_INIT_POINTER(local->monitor_sdata, NULL);
2260                         synchronize_net();
2261                         kfree(sdata);
2262                 }
2263         }
2264
2265         list_for_each_entry(sdata, &local->interfaces, list) {
2266                 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
2267                     sdata->vif.type != NL80211_IFTYPE_MONITOR &&
2268                     ieee80211_sdata_running(sdata)) {
2269                         res = drv_add_interface(local, sdata);
2270                         if (WARN_ON(res))
2271                                 break;
2272                 }
2273         }
2274
2275         /* If adding any of the interfaces failed above, roll back and
2276          * report failure.
2277          */
2278         if (res) {
2279                 list_for_each_entry_continue_reverse(sdata, &local->interfaces,
2280                                                      list)
2281                         if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
2282                             sdata->vif.type != NL80211_IFTYPE_MONITOR &&
2283                             ieee80211_sdata_running(sdata))
2284                                 drv_remove_interface(local, sdata);
2285                 ieee80211_handle_reconfig_failure(local);
2286                 return res;
2287         }
2288
2289         /* add channel contexts */
2290         if (local->use_chanctx) {
2291                 mutex_lock(&local->chanctx_mtx);
2292                 list_for_each_entry(ctx, &local->chanctx_list, list)
2293                         if (ctx->replace_state !=
2294                             IEEE80211_CHANCTX_REPLACES_OTHER)
2295                                 WARN_ON(drv_add_chanctx(local, ctx));
2296                 mutex_unlock(&local->chanctx_mtx);
2297
2298                 sdata = rtnl_dereference(local->monitor_sdata);
2299                 if (sdata && ieee80211_sdata_running(sdata))
2300                         ieee80211_assign_chanctx(local, sdata);
2301         }
2302
2303         /* reconfigure hardware */
2304         ieee80211_hw_config(local, ~0);
2305
2306         ieee80211_configure_filter(local);
2307
2308         /* Finally also reconfigure all the BSS information */
2309         list_for_each_entry(sdata, &local->interfaces, list) {
2310                 u32 changed;
2311
2312                 if (!ieee80211_sdata_running(sdata))
2313                         continue;
2314
2315                 ieee80211_assign_chanctx(local, sdata);
2316
2317                 switch (sdata->vif.type) {
2318                 case NL80211_IFTYPE_AP_VLAN:
2319                 case NL80211_IFTYPE_MONITOR:
2320                         break;
2321                 case NL80211_IFTYPE_ADHOC:
2322                         if (sdata->vif.bss_conf.ibss_joined)
2323                                 WARN_ON(drv_join_ibss(local, sdata));
2324                         /* fall through */
2325                 default:
2326                         ieee80211_reconfig_stations(sdata);
2327                         /* fall through */
2328                 case NL80211_IFTYPE_AP: /* AP stations are handled later */
2329                         for (i = 0; i < IEEE80211_NUM_ACS; i++)
2330                                 drv_conf_tx(local, sdata, i,
2331                                             &sdata->tx_conf[i]);
2332                         break;
2333                 }
2334
2335                 /* common change flags for all interface types */
2336                 changed = BSS_CHANGED_ERP_CTS_PROT |
2337                           BSS_CHANGED_ERP_PREAMBLE |
2338                           BSS_CHANGED_ERP_SLOT |
2339                           BSS_CHANGED_HT |
2340                           BSS_CHANGED_BASIC_RATES |
2341                           BSS_CHANGED_BEACON_INT |
2342                           BSS_CHANGED_BSSID |
2343                           BSS_CHANGED_CQM |
2344                           BSS_CHANGED_QOS |
2345                           BSS_CHANGED_IDLE |
2346                           BSS_CHANGED_TXPOWER |
2347                           BSS_CHANGED_MCAST_RATE;
2348
2349                 if (sdata->vif.mu_mimo_owner)
2350                         changed |= BSS_CHANGED_MU_GROUPS;
2351
2352                 switch (sdata->vif.type) {
2353                 case NL80211_IFTYPE_STATION:
2354                         changed |= BSS_CHANGED_ASSOC |
2355                                    BSS_CHANGED_ARP_FILTER |
2356                                    BSS_CHANGED_PS;
2357
2358                         /* Re-send beacon info report to the driver */
2359                         if (sdata->u.mgd.have_beacon)
2360                                 changed |= BSS_CHANGED_BEACON_INFO;
2361
2362                         if (sdata->vif.bss_conf.max_idle_period ||
2363                             sdata->vif.bss_conf.protected_keep_alive)
2364                                 changed |= BSS_CHANGED_KEEP_ALIVE;
2365
2366                         sdata_lock(sdata);
2367                         ieee80211_bss_info_change_notify(sdata, changed);
2368                         sdata_unlock(sdata);
2369                         break;
2370                 case NL80211_IFTYPE_OCB:
2371                         changed |= BSS_CHANGED_OCB;
2372                         ieee80211_bss_info_change_notify(sdata, changed);
2373                         break;
2374                 case NL80211_IFTYPE_ADHOC:
2375                         changed |= BSS_CHANGED_IBSS;
2376                         /* fall through */
2377                 case NL80211_IFTYPE_AP:
2378                         changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
2379
2380                         if (sdata->vif.bss_conf.ftm_responder == 1 &&
2381                             wiphy_ext_feature_isset(sdata->local->hw.wiphy,
2382                                         NL80211_EXT_FEATURE_ENABLE_FTM_RESPONDER))
2383                                 changed |= BSS_CHANGED_FTM_RESPONDER;
2384
2385                         if (sdata->vif.type == NL80211_IFTYPE_AP) {
2386                                 changed |= BSS_CHANGED_AP_PROBE_RESP;
2387
2388                                 if (rcu_access_pointer(sdata->u.ap.beacon))
2389                                         drv_start_ap(local, sdata);
2390                         }
2391
2392                         /* fall through */
2393                 case NL80211_IFTYPE_MESH_POINT:
2394                         if (sdata->vif.bss_conf.enable_beacon) {
2395                                 changed |= BSS_CHANGED_BEACON |
2396                                            BSS_CHANGED_BEACON_ENABLED;
2397                                 ieee80211_bss_info_change_notify(sdata, changed);
2398                         }
2399                         break;
2400                 case NL80211_IFTYPE_NAN:
2401                         res = ieee80211_reconfig_nan(sdata);
2402                         if (res < 0) {
2403                                 ieee80211_handle_reconfig_failure(local);
2404                                 return res;
2405                         }
2406                         break;
2407                 case NL80211_IFTYPE_WDS:
2408                 case NL80211_IFTYPE_AP_VLAN:
2409                 case NL80211_IFTYPE_MONITOR:
2410                 case NL80211_IFTYPE_P2P_DEVICE:
2411                         /* nothing to do */
2412                         break;
2413                 case NL80211_IFTYPE_UNSPECIFIED:
2414                 case NUM_NL80211_IFTYPES:
2415                 case NL80211_IFTYPE_P2P_CLIENT:
2416                 case NL80211_IFTYPE_P2P_GO:
2417                         WARN_ON(1);
2418                         break;
2419                 }
2420         }
2421
2422         ieee80211_recalc_ps(local);
2423
2424         /*
2425          * The sta might be in psm against the ap (e.g. because
2426          * this was the state before a hw restart), so we
2427          * explicitly send a null packet in order to make sure
2428          * it'll sync against the ap (and get out of psm).
2429          */
2430         if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
2431                 list_for_each_entry(sdata, &local->interfaces, list) {
2432                         if (sdata->vif.type != NL80211_IFTYPE_STATION)
2433                                 continue;
2434                         if (!sdata->u.mgd.associated)
2435                                 continue;
2436
2437                         ieee80211_send_nullfunc(local, sdata, false);
2438                 }
2439         }
2440
2441         /* APs are now beaconing, add back stations */
2442         mutex_lock(&local->sta_mtx);
2443         list_for_each_entry(sta, &local->sta_list, list) {
2444                 enum ieee80211_sta_state state;
2445
2446                 if (!sta->uploaded)
2447                         continue;
2448
2449                 if (sta->sdata->vif.type != NL80211_IFTYPE_AP &&
2450                     sta->sdata->vif.type != NL80211_IFTYPE_AP_VLAN)
2451                         continue;
2452
2453                 for (state = IEEE80211_STA_NOTEXIST;
2454                      state < sta->sta_state; state++)
2455                         WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2456                                               state + 1));
2457         }
2458         mutex_unlock(&local->sta_mtx);
2459
2460         /* add back keys */
2461         list_for_each_entry(sdata, &local->interfaces, list)
2462                 ieee80211_reenable_keys(sdata);
2463
2464         /* Reconfigure sched scan if it was interrupted by FW restart */
2465         mutex_lock(&local->mtx);
2466         sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
2467                                                 lockdep_is_held(&local->mtx));
2468         sched_scan_req = rcu_dereference_protected(local->sched_scan_req,
2469                                                 lockdep_is_held(&local->mtx));
2470         if (sched_scan_sdata && sched_scan_req)
2471                 /*
2472                  * Sched scan stopped, but we don't want to report it. Instead,
2473                  * we're trying to reschedule. However, if more than one scan
2474                  * plan was set, we cannot reschedule since we don't know which
2475                  * scan plan was currently running (and some scan plans may have
2476                  * already finished).
2477                  */
2478                 if (sched_scan_req->n_scan_plans > 1 ||
2479                     __ieee80211_request_sched_scan_start(sched_scan_sdata,
2480                                                          sched_scan_req)) {
2481                         RCU_INIT_POINTER(local->sched_scan_sdata, NULL);
2482                         RCU_INIT_POINTER(local->sched_scan_req, NULL);
2483                         sched_scan_stopped = true;
2484                 }
2485         mutex_unlock(&local->mtx);
2486
2487         if (sched_scan_stopped)
2488                 cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy, 0);
2489
2490  wake_up:
2491
2492         if (local->monitors == local->open_count && local->monitors > 0)
2493                 ieee80211_add_virtual_monitor(local);
2494
2495         /*
2496          * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
2497          * sessions can be established after a resume.
2498          *
2499          * Also tear down aggregation sessions since reconfiguring
2500          * them in a hardware restart scenario is not easily done
2501          * right now, and the hardware will have lost information
2502          * about the sessions, but we and the AP still think they
2503          * are active. This is really a workaround though.
2504          */
2505         if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) {
2506                 mutex_lock(&local->sta_mtx);
2507
2508                 list_for_each_entry(sta, &local->sta_list, list) {
2509                         if (!local->resuming)
2510                                 ieee80211_sta_tear_down_BA_sessions(
2511                                                 sta, AGG_STOP_LOCAL_REQUEST);
2512                         clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
2513                 }
2514
2515                 mutex_unlock(&local->sta_mtx);
2516         }
2517
2518         if (local->in_reconfig) {
2519                 local->in_reconfig = false;
2520                 barrier();
2521
2522                 /* Restart deferred ROCs */
2523                 mutex_lock(&local->mtx);
2524                 ieee80211_start_next_roc(local);
2525                 mutex_unlock(&local->mtx);
2526
2527                 /* Requeue all works */
2528                 list_for_each_entry(sdata, &local->interfaces, list)
2529                         ieee80211_queue_work(&local->hw, &sdata->work);
2530         }
2531
2532         ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
2533                                         IEEE80211_QUEUE_STOP_REASON_SUSPEND,
2534                                         false);
2535
2536         /*
2537          * If this is for hw restart things are still running.
2538          * We may want to change that later, however.
2539          */
2540         if (local->open_count && (!suspended || reconfig_due_to_wowlan))
2541                 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART);
2542
2543         if (!suspended)
2544                 return 0;
2545
2546 #ifdef CONFIG_PM
2547         /* first set suspended false, then resuming */
2548         local->suspended = false;
2549         mb();
2550         local->resuming = false;
2551
2552         ieee80211_flush_completed_scan(local, false);
2553
2554         if (local->open_count && !reconfig_due_to_wowlan)
2555                 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND);
2556
2557         list_for_each_entry(sdata, &local->interfaces, list) {
2558                 if (!ieee80211_sdata_running(sdata))
2559                         continue;
2560                 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2561                         ieee80211_sta_restart(sdata);
2562         }
2563
2564         mod_timer(&local->sta_cleanup, jiffies + 1);
2565 #else
2566         WARN_ON(1);
2567 #endif
2568
2569         return 0;
2570 }
2571
2572 void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
2573 {
2574         struct ieee80211_sub_if_data *sdata;
2575         struct ieee80211_local *local;
2576         struct ieee80211_key *key;
2577
2578         if (WARN_ON(!vif))
2579                 return;
2580
2581         sdata = vif_to_sdata(vif);
2582         local = sdata->local;
2583
2584         if (WARN_ON(!local->resuming))
2585                 return;
2586
2587         if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
2588                 return;
2589
2590         sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
2591
2592         mutex_lock(&local->key_mtx);
2593         list_for_each_entry(key, &sdata->key_list, list)
2594                 key->flags |= KEY_FLAG_TAINTED;
2595         mutex_unlock(&local->key_mtx);
2596 }
2597 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
2598
2599 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
2600 {
2601         struct ieee80211_local *local = sdata->local;
2602         struct ieee80211_chanctx_conf *chanctx_conf;
2603         struct ieee80211_chanctx *chanctx;
2604
2605         mutex_lock(&local->chanctx_mtx);
2606
2607         chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2608                                         lockdep_is_held(&local->chanctx_mtx));
2609
2610         /*
2611          * This function can be called from a work, thus it may be possible
2612          * that the chanctx_conf is removed (due to a disconnection, for
2613          * example).
2614          * So nothing should be done in such case.
2615          */
2616         if (!chanctx_conf)
2617                 goto unlock;
2618
2619         chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2620         ieee80211_recalc_smps_chanctx(local, chanctx);
2621  unlock:
2622         mutex_unlock(&local->chanctx_mtx);
2623 }
2624
2625 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata)
2626 {
2627         struct ieee80211_local *local = sdata->local;
2628         struct ieee80211_chanctx_conf *chanctx_conf;
2629         struct ieee80211_chanctx *chanctx;
2630
2631         mutex_lock(&local->chanctx_mtx);
2632
2633         chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2634                                         lockdep_is_held(&local->chanctx_mtx));
2635
2636         if (WARN_ON_ONCE(!chanctx_conf))
2637                 goto unlock;
2638
2639         chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2640         ieee80211_recalc_chanctx_min_def(local, chanctx);
2641  unlock:
2642         mutex_unlock(&local->chanctx_mtx);
2643 }
2644
2645 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
2646 {
2647         size_t pos = offset;
2648
2649         while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
2650                 pos += 2 + ies[pos + 1];
2651
2652         return pos;
2653 }
2654
2655 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
2656                                             int rssi_min_thold,
2657                                             int rssi_max_thold)
2658 {
2659         trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
2660
2661         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2662                 return;
2663
2664         /*
2665          * Scale up threshold values before storing it, as the RSSI averaging
2666          * algorithm uses a scaled up value as well. Change this scaling
2667          * factor if the RSSI averaging algorithm changes.
2668          */
2669         sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
2670         sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
2671 }
2672
2673 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
2674                                     int rssi_min_thold,
2675                                     int rssi_max_thold)
2676 {
2677         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2678
2679         WARN_ON(rssi_min_thold == rssi_max_thold ||
2680                 rssi_min_thold > rssi_max_thold);
2681
2682         _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
2683                                        rssi_max_thold);
2684 }
2685 EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
2686
2687 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
2688 {
2689         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2690
2691         _ieee80211_enable_rssi_reports(sdata, 0, 0);
2692 }
2693 EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
2694
2695 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2696                               u16 cap)
2697 {
2698         __le16 tmp;
2699
2700         *pos++ = WLAN_EID_HT_CAPABILITY;
2701         *pos++ = sizeof(struct ieee80211_ht_cap);
2702         memset(pos, 0, sizeof(struct ieee80211_ht_cap));
2703
2704         /* capability flags */
2705         tmp = cpu_to_le16(cap);
2706         memcpy(pos, &tmp, sizeof(u16));
2707         pos += sizeof(u16);
2708
2709         /* AMPDU parameters */
2710         *pos++ = ht_cap->ampdu_factor |
2711                  (ht_cap->ampdu_density <<
2712                         IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
2713
2714         /* MCS set */
2715         memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2716         pos += sizeof(ht_cap->mcs);
2717
2718         /* extended capabilities */
2719         pos += sizeof(__le16);
2720
2721         /* BF capabilities */
2722         pos += sizeof(__le32);
2723
2724         /* antenna selection */
2725         pos += sizeof(u8);
2726
2727         return pos;
2728 }
2729
2730 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2731                                u32 cap)
2732 {
2733         __le32 tmp;
2734
2735         *pos++ = WLAN_EID_VHT_CAPABILITY;
2736         *pos++ = sizeof(struct ieee80211_vht_cap);
2737         memset(pos, 0, sizeof(struct ieee80211_vht_cap));
2738
2739         /* capability flags */
2740         tmp = cpu_to_le32(cap);
2741         memcpy(pos, &tmp, sizeof(u32));
2742         pos += sizeof(u32);
2743
2744         /* VHT MCS set */
2745         memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2746         pos += sizeof(vht_cap->vht_mcs);
2747
2748         return pos;
2749 }
2750
2751 u8 ieee80211_ie_len_he_cap(struct ieee80211_sub_if_data *sdata, u8 iftype)
2752 {
2753         const struct ieee80211_sta_he_cap *he_cap;
2754         struct ieee80211_supported_band *sband;
2755         u8 n;
2756
2757         sband = ieee80211_get_sband(sdata);
2758         if (!sband)
2759                 return 0;
2760
2761         he_cap = ieee80211_get_he_iftype_cap(sband, iftype);
2762         if (!he_cap)
2763                 return 0;
2764
2765         n = ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem);
2766         return 2 + 1 +
2767                sizeof(he_cap->he_cap_elem) + n +
2768                ieee80211_he_ppe_size(he_cap->ppe_thres[0],
2769                                      he_cap->he_cap_elem.phy_cap_info);
2770 }
2771
2772 u8 *ieee80211_ie_build_he_cap(u8 *pos,
2773                               const struct ieee80211_sta_he_cap *he_cap,
2774                               u8 *end)
2775 {
2776         u8 n;
2777         u8 ie_len;
2778         u8 *orig_pos = pos;
2779
2780         /* Make sure we have place for the IE */
2781         /*
2782          * TODO: the 1 added is because this temporarily is under the EXTENSION
2783          * IE. Get rid of it when it moves.
2784          */
2785         if (!he_cap)
2786                 return orig_pos;
2787
2788         n = ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem);
2789         ie_len = 2 + 1 +
2790                  sizeof(he_cap->he_cap_elem) + n +
2791                  ieee80211_he_ppe_size(he_cap->ppe_thres[0],
2792                                        he_cap->he_cap_elem.phy_cap_info);
2793
2794         if ((end - pos) < ie_len)
2795                 return orig_pos;
2796
2797         *pos++ = WLAN_EID_EXTENSION;
2798         pos++; /* We'll set the size later below */
2799         *pos++ = WLAN_EID_EXT_HE_CAPABILITY;
2800
2801         /* Fixed data */
2802         memcpy(pos, &he_cap->he_cap_elem, sizeof(he_cap->he_cap_elem));
2803         pos += sizeof(he_cap->he_cap_elem);
2804
2805         memcpy(pos, &he_cap->he_mcs_nss_supp, n);
2806         pos += n;
2807
2808         /* Check if PPE Threshold should be present */
2809         if ((he_cap->he_cap_elem.phy_cap_info[6] &
2810              IEEE80211_HE_PHY_CAP6_PPE_THRESHOLD_PRESENT) == 0)
2811                 goto end;
2812
2813         /*
2814          * Calculate how many PPET16/PPET8 pairs are to come. Algorithm:
2815          * (NSS_M1 + 1) x (num of 1 bits in RU_INDEX_BITMASK)
2816          */
2817         n = hweight8(he_cap->ppe_thres[0] &
2818                      IEEE80211_PPE_THRES_RU_INDEX_BITMASK_MASK);
2819         n *= (1 + ((he_cap->ppe_thres[0] & IEEE80211_PPE_THRES_NSS_MASK) >>
2820                    IEEE80211_PPE_THRES_NSS_POS));
2821
2822         /*
2823          * Each pair is 6 bits, and we need to add the 7 "header" bits to the
2824          * total size.
2825          */
2826         n = (n * IEEE80211_PPE_THRES_INFO_PPET_SIZE * 2) + 7;
2827         n = DIV_ROUND_UP(n, 8);
2828
2829         /* Copy PPE Thresholds */
2830         memcpy(pos, &he_cap->ppe_thres, n);
2831         pos += n;
2832
2833 end:
2834         orig_pos[1] = (pos - orig_pos) - 2;
2835         return pos;
2836 }
2837
2838 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2839                                const struct cfg80211_chan_def *chandef,
2840                                u16 prot_mode, bool rifs_mode)
2841 {
2842         struct ieee80211_ht_operation *ht_oper;
2843         /* Build HT Information */
2844         *pos++ = WLAN_EID_HT_OPERATION;
2845         *pos++ = sizeof(struct ieee80211_ht_operation);
2846         ht_oper = (struct ieee80211_ht_operation *)pos;
2847         ht_oper->primary_chan = ieee80211_frequency_to_channel(
2848                                         chandef->chan->center_freq);
2849         switch (chandef->width) {
2850         case NL80211_CHAN_WIDTH_160:
2851         case NL80211_CHAN_WIDTH_80P80:
2852         case NL80211_CHAN_WIDTH_80:
2853         case NL80211_CHAN_WIDTH_40:
2854                 if (chandef->center_freq1 > chandef->chan->center_freq)
2855                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2856                 else
2857                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2858                 break;
2859         default:
2860                 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
2861                 break;
2862         }
2863         if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
2864             chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
2865             chandef->width != NL80211_CHAN_WIDTH_20)
2866                 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
2867
2868         if (rifs_mode)
2869                 ht_oper->ht_param |= IEEE80211_HT_PARAM_RIFS_MODE;
2870
2871         ht_oper->operation_mode = cpu_to_le16(prot_mode);
2872         ht_oper->stbc_param = 0x0000;
2873
2874         /* It seems that Basic MCS set and Supported MCS set
2875            are identical for the first 10 bytes */
2876         memset(&ht_oper->basic_set, 0, 16);
2877         memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
2878
2879         return pos + sizeof(struct ieee80211_ht_operation);
2880 }
2881
2882 void ieee80211_ie_build_wide_bw_cs(u8 *pos,
2883                                    const struct cfg80211_chan_def *chandef)
2884 {
2885         *pos++ = WLAN_EID_WIDE_BW_CHANNEL_SWITCH;       /* EID */
2886         *pos++ = 3;                                     /* IE length */
2887         /* New channel width */
2888         switch (chandef->width) {
2889         case NL80211_CHAN_WIDTH_80:
2890                 *pos++ = IEEE80211_VHT_CHANWIDTH_80MHZ;
2891                 break;
2892         case NL80211_CHAN_WIDTH_160:
2893                 *pos++ = IEEE80211_VHT_CHANWIDTH_160MHZ;
2894                 break;
2895         case NL80211_CHAN_WIDTH_80P80:
2896                 *pos++ = IEEE80211_VHT_CHANWIDTH_80P80MHZ;
2897                 break;
2898         default:
2899                 *pos++ = IEEE80211_VHT_CHANWIDTH_USE_HT;
2900         }
2901
2902         /* new center frequency segment 0 */
2903         *pos++ = ieee80211_frequency_to_channel(chandef->center_freq1);
2904         /* new center frequency segment 1 */
2905         if (chandef->center_freq2)
2906                 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq2);
2907         else
2908                 *pos++ = 0;
2909 }
2910
2911 u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2912                                 const struct cfg80211_chan_def *chandef)
2913 {
2914         struct ieee80211_vht_operation *vht_oper;
2915
2916         *pos++ = WLAN_EID_VHT_OPERATION;
2917         *pos++ = sizeof(struct ieee80211_vht_operation);
2918         vht_oper = (struct ieee80211_vht_operation *)pos;
2919         vht_oper->center_freq_seg0_idx = ieee80211_frequency_to_channel(
2920                                                         chandef->center_freq1);
2921         if (chandef->center_freq2)
2922                 vht_oper->center_freq_seg1_idx =
2923                         ieee80211_frequency_to_channel(chandef->center_freq2);
2924         else
2925                 vht_oper->center_freq_seg1_idx = 0x00;
2926
2927         switch (chandef->width) {
2928         case NL80211_CHAN_WIDTH_160:
2929                 /*
2930                  * Convert 160 MHz channel width to new style as interop
2931                  * workaround.
2932                  */
2933                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2934                 vht_oper->center_freq_seg1_idx = vht_oper->center_freq_seg0_idx;
2935                 if (chandef->chan->center_freq < chandef->center_freq1)
2936                         vht_oper->center_freq_seg0_idx -= 8;
2937                 else
2938                         vht_oper->center_freq_seg0_idx += 8;
2939                 break;
2940         case NL80211_CHAN_WIDTH_80P80:
2941                 /*
2942                  * Convert 80+80 MHz channel width to new style as interop
2943                  * workaround.
2944                  */
2945                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2946                 break;
2947         case NL80211_CHAN_WIDTH_80:
2948                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2949                 break;
2950         default:
2951                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT;
2952                 break;
2953         }
2954
2955         /* don't require special VHT peer rates */
2956         vht_oper->basic_mcs_set = cpu_to_le16(0xffff);
2957
2958         return pos + sizeof(struct ieee80211_vht_operation);
2959 }
2960
2961 u8 *ieee80211_ie_build_he_oper(u8 *pos)
2962 {
2963         struct ieee80211_he_operation *he_oper;
2964         u32 he_oper_params;
2965
2966         *pos++ = WLAN_EID_EXTENSION;
2967         *pos++ = 1 + sizeof(struct ieee80211_he_operation);
2968         *pos++ = WLAN_EID_EXT_HE_OPERATION;
2969
2970         he_oper_params = 0;
2971         he_oper_params |= u32_encode_bits(1023, /* disabled */
2972                                 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK);
2973         he_oper_params |= u32_encode_bits(1,
2974                                 IEEE80211_HE_OPERATION_ER_SU_DISABLE);
2975         he_oper_params |= u32_encode_bits(1,
2976                                 IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED);
2977
2978         he_oper = (struct ieee80211_he_operation *)pos;
2979         he_oper->he_oper_params = cpu_to_le32(he_oper_params);
2980
2981         /* don't require special HE peer rates */
2982         he_oper->he_mcs_nss_set = cpu_to_le16(0xffff);
2983
2984         /* TODO add VHT operational and 6GHz operational subelement? */
2985
2986         return pos + sizeof(struct ieee80211_vht_operation);
2987 }
2988
2989 bool ieee80211_chandef_ht_oper(const struct ieee80211_ht_operation *ht_oper,
2990                                struct cfg80211_chan_def *chandef)
2991 {
2992         enum nl80211_channel_type channel_type;
2993
2994         if (!ht_oper)
2995                 return false;
2996
2997         switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
2998         case IEEE80211_HT_PARAM_CHA_SEC_NONE:
2999                 channel_type = NL80211_CHAN_HT20;
3000                 break;
3001         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
3002                 channel_type = NL80211_CHAN_HT40PLUS;
3003                 break;
3004         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
3005                 channel_type = NL80211_CHAN_HT40MINUS;
3006                 break;
3007         default:
3008                 channel_type = NL80211_CHAN_NO_HT;
3009                 return false;
3010         }
3011
3012         cfg80211_chandef_create(chandef, chandef->chan, channel_type);
3013         return true;
3014 }
3015
3016 bool ieee80211_chandef_vht_oper(struct ieee80211_hw *hw,
3017                                 const struct ieee80211_vht_operation *oper,
3018                                 const struct ieee80211_ht_operation *htop,
3019                                 struct cfg80211_chan_def *chandef)
3020 {
3021         struct cfg80211_chan_def new = *chandef;
3022         int cf0, cf1;
3023         int ccfs0, ccfs1, ccfs2;
3024         int ccf0, ccf1;
3025         u32 vht_cap;
3026         bool support_80_80 = false;
3027         bool support_160 = false;
3028
3029         if (!oper || !htop)
3030                 return false;
3031
3032         vht_cap = hw->wiphy->bands[chandef->chan->band]->vht_cap.cap;
3033         support_160 = (vht_cap & (IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK |
3034                                   IEEE80211_VHT_CAP_EXT_NSS_BW_MASK));
3035         support_80_80 = ((vht_cap &
3036                          IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) ||
3037                         (vht_cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ &&
3038                          vht_cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) ||
3039                         ((vht_cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) >>
3040                                     IEEE80211_VHT_CAP_EXT_NSS_BW_SHIFT > 1));
3041         ccfs0 = oper->center_freq_seg0_idx;
3042         ccfs1 = oper->center_freq_seg1_idx;
3043         ccfs2 = (le16_to_cpu(htop->operation_mode) &
3044                                 IEEE80211_HT_OP_MODE_CCFS2_MASK)
3045                         >> IEEE80211_HT_OP_MODE_CCFS2_SHIFT;
3046
3047         /* when parsing (and we know how to) CCFS1 and CCFS2 are equivalent */
3048         ccf0 = ccfs0;
3049         ccf1 = ccfs1;
3050         if (!ccfs1 && ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW))
3051                 ccf1 = ccfs2;
3052
3053         cf0 = ieee80211_channel_to_frequency(ccf0, chandef->chan->band);
3054         cf1 = ieee80211_channel_to_frequency(ccf1, chandef->chan->band);
3055
3056         switch (oper->chan_width) {
3057         case IEEE80211_VHT_CHANWIDTH_USE_HT:
3058                 /* just use HT information directly */
3059                 break;
3060         case IEEE80211_VHT_CHANWIDTH_80MHZ:
3061                 new.width = NL80211_CHAN_WIDTH_80;
3062                 new.center_freq1 = cf0;
3063                 /* If needed, adjust based on the newer interop workaround. */
3064                 if (ccf1) {
3065                         unsigned int diff;
3066
3067                         diff = abs(ccf1 - ccf0);
3068                         if ((diff == 8) && support_160) {
3069                                 new.width = NL80211_CHAN_WIDTH_160;
3070                                 new.center_freq1 = cf1;
3071                         } else if ((diff > 8) && support_80_80) {
3072                                 new.width = NL80211_CHAN_WIDTH_80P80;
3073                                 new.center_freq2 = cf1;
3074                         }
3075                 }
3076                 break;
3077         case IEEE80211_VHT_CHANWIDTH_160MHZ:
3078                 /* deprecated encoding */
3079                 new.width = NL80211_CHAN_WIDTH_160;
3080                 new.center_freq1 = cf0;
3081                 break;
3082         case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
3083                 /* deprecated encoding */
3084                 new.width = NL80211_CHAN_WIDTH_80P80;
3085                 new.center_freq1 = cf0;
3086                 new.center_freq2 = cf1;
3087                 break;
3088         default:
3089                 return false;
3090         }
3091
3092         if (!cfg80211_chandef_valid(&new))
3093                 return false;
3094
3095         *chandef = new;
3096         return true;
3097 }
3098
3099 int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
3100                              const struct ieee80211_supported_band *sband,
3101                              const u8 *srates, int srates_len, u32 *rates)
3102 {
3103         u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
3104         int shift = ieee80211_chandef_get_shift(chandef);
3105         struct ieee80211_rate *br;
3106         int brate, rate, i, j, count = 0;
3107
3108         *rates = 0;
3109
3110         for (i = 0; i < srates_len; i++) {
3111                 rate = srates[i] & 0x7f;
3112
3113                 for (j = 0; j < sband->n_bitrates; j++) {
3114                         br = &sband->bitrates[j];
3115                         if ((rate_flags & br->flags) != rate_flags)
3116                                 continue;
3117
3118                         brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
3119                         if (brate == rate) {
3120                                 *rates |= BIT(j);
3121                                 count++;
3122                                 break;
3123                         }
3124                 }
3125         }
3126         return count;
3127 }
3128
3129 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
3130                             struct sk_buff *skb, bool need_basic,
3131                             enum nl80211_band band)
3132 {
3133         struct ieee80211_local *local = sdata->local;
3134         struct ieee80211_supported_band *sband;
3135         int rate, shift;
3136         u8 i, rates, *pos;
3137         u32 basic_rates = sdata->vif.bss_conf.basic_rates;
3138         u32 rate_flags;
3139
3140         shift = ieee80211_vif_get_shift(&sdata->vif);
3141         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
3142         sband = local->hw.wiphy->bands[band];
3143         rates = 0;
3144         for (i = 0; i < sband->n_bitrates; i++) {
3145                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3146                         continue;
3147                 rates++;
3148         }
3149         if (rates > 8)
3150                 rates = 8;
3151
3152         if (skb_tailroom(skb) < rates + 2)
3153                 return -ENOMEM;
3154
3155         pos = skb_put(skb, rates + 2);
3156         *pos++ = WLAN_EID_SUPP_RATES;
3157         *pos++ = rates;
3158         for (i = 0; i < rates; i++) {
3159                 u8 basic = 0;
3160                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3161                         continue;
3162
3163                 if (need_basic && basic_rates & BIT(i))
3164                         basic = 0x80;
3165                 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
3166                                     5 * (1 << shift));
3167                 *pos++ = basic | (u8) rate;
3168         }
3169
3170         return 0;
3171 }
3172
3173 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
3174                                 struct sk_buff *skb, bool need_basic,
3175                                 enum nl80211_band band)
3176 {
3177         struct ieee80211_local *local = sdata->local;
3178         struct ieee80211_supported_band *sband;
3179         int rate, shift;
3180         u8 i, exrates, *pos;
3181         u32 basic_rates = sdata->vif.bss_conf.basic_rates;
3182         u32 rate_flags;
3183
3184         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
3185         shift = ieee80211_vif_get_shift(&sdata->vif);
3186
3187         sband = local->hw.wiphy->bands[band];
3188         exrates = 0;
3189         for (i = 0; i < sband->n_bitrates; i++) {
3190                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3191                         continue;
3192                 exrates++;
3193         }
3194
3195         if (exrates > 8)
3196                 exrates -= 8;
3197         else
3198                 exrates = 0;
3199
3200         if (skb_tailroom(skb) < exrates + 2)
3201                 return -ENOMEM;
3202
3203         if (exrates) {
3204                 pos = skb_put(skb, exrates + 2);
3205                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
3206                 *pos++ = exrates;
3207                 for (i = 8; i < sband->n_bitrates; i++) {
3208                         u8 basic = 0;
3209                         if ((rate_flags & sband->bitrates[i].flags)
3210                             != rate_flags)
3211                                 continue;
3212                         if (need_basic && basic_rates & BIT(i))
3213                                 basic = 0x80;
3214                         rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
3215                                             5 * (1 << shift));
3216                         *pos++ = basic | (u8) rate;
3217                 }
3218         }
3219         return 0;
3220 }
3221
3222 int ieee80211_ave_rssi(struct ieee80211_vif *vif)
3223 {
3224         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3225         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3226
3227         if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
3228                 /* non-managed type inferfaces */
3229                 return 0;
3230         }
3231         return -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3232 }
3233 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
3234
3235 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
3236 {
3237         if (!mcs)
3238                 return 1;
3239
3240         /* TODO: consider rx_highest */
3241
3242         if (mcs->rx_mask[3])
3243                 return 4;
3244         if (mcs->rx_mask[2])
3245                 return 3;
3246         if (mcs->rx_mask[1])
3247                 return 2;
3248         return 1;
3249 }
3250
3251 /**
3252  * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
3253  * @local: mac80211 hw info struct
3254  * @status: RX status
3255  * @mpdu_len: total MPDU length (including FCS)
3256  * @mpdu_offset: offset into MPDU to calculate timestamp at
3257  *
3258  * This function calculates the RX timestamp at the given MPDU offset, taking
3259  * into account what the RX timestamp was. An offset of 0 will just normalize
3260  * the timestamp to TSF at beginning of MPDU reception.
3261  */
3262 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
3263                                      struct ieee80211_rx_status *status,
3264                                      unsigned int mpdu_len,
3265                                      unsigned int mpdu_offset)
3266 {
3267         u64 ts = status->mactime;
3268         struct rate_info ri;
3269         u16 rate;
3270
3271         if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
3272                 return 0;
3273
3274         memset(&ri, 0, sizeof(ri));
3275
3276         ri.bw = status->bw;
3277
3278         /* Fill cfg80211 rate info */
3279         switch (status->encoding) {
3280         case RX_ENC_HT:
3281                 ri.mcs = status->rate_idx;
3282                 ri.flags |= RATE_INFO_FLAGS_MCS;
3283                 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3284                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3285                 break;
3286         case RX_ENC_VHT:
3287                 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
3288                 ri.mcs = status->rate_idx;
3289                 ri.nss = status->nss;
3290                 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3291                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3292                 break;
3293         default:
3294                 WARN_ON(1);
3295                 /* fall through */
3296         case RX_ENC_LEGACY: {
3297                 struct ieee80211_supported_band *sband;
3298                 int shift = 0;
3299                 int bitrate;
3300
3301                 switch (status->bw) {
3302                 case RATE_INFO_BW_10:
3303                         shift = 1;
3304                         break;
3305                 case RATE_INFO_BW_5:
3306                         shift = 2;
3307                         break;
3308                 }
3309
3310                 sband = local->hw.wiphy->bands[status->band];
3311                 bitrate = sband->bitrates[status->rate_idx].bitrate;
3312                 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
3313
3314                 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
3315                         /* TODO: handle HT/VHT preambles */
3316                         if (status->band == NL80211_BAND_5GHZ) {
3317                                 ts += 20 << shift;
3318                                 mpdu_offset += 2;
3319                         } else if (status->enc_flags & RX_ENC_FLAG_SHORTPRE) {
3320                                 ts += 96;
3321                         } else {
3322                                 ts += 192;
3323                         }
3324                 }
3325                 break;
3326                 }
3327         }
3328
3329         rate = cfg80211_calculate_bitrate(&ri);
3330         if (WARN_ONCE(!rate,
3331                       "Invalid bitrate: flags=0x%llx, idx=%d, vht_nss=%d\n",
3332                       (unsigned long long)status->flag, status->rate_idx,
3333                       status->nss))
3334                 return 0;
3335
3336         /* rewind from end of MPDU */
3337         if (status->flag & RX_FLAG_MACTIME_END)
3338                 ts -= mpdu_len * 8 * 10 / rate;
3339
3340         ts += mpdu_offset * 8 * 10 / rate;
3341
3342         return ts;
3343 }
3344
3345 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
3346 {
3347         struct ieee80211_sub_if_data *sdata;
3348         struct cfg80211_chan_def chandef;
3349
3350         /* for interface list, to avoid linking iflist_mtx and chanctx_mtx */
3351         ASSERT_RTNL();
3352
3353         mutex_lock(&local->mtx);
3354         list_for_each_entry(sdata, &local->interfaces, list) {
3355                 /* it might be waiting for the local->mtx, but then
3356                  * by the time it gets it, sdata->wdev.cac_started
3357                  * will no longer be true
3358                  */
3359                 cancel_delayed_work(&sdata->dfs_cac_timer_work);
3360
3361                 if (sdata->wdev.cac_started) {
3362                         chandef = sdata->vif.bss_conf.chandef;
3363                         ieee80211_vif_release_channel(sdata);
3364                         cfg80211_cac_event(sdata->dev,
3365                                            &chandef,
3366                                            NL80211_RADAR_CAC_ABORTED,
3367                                            GFP_KERNEL);
3368                 }
3369         }
3370         mutex_unlock(&local->mtx);
3371 }
3372
3373 void ieee80211_dfs_radar_detected_work(struct work_struct *work)
3374 {
3375         struct ieee80211_local *local =
3376                 container_of(work, struct ieee80211_local, radar_detected_work);
3377         struct cfg80211_chan_def chandef = local->hw.conf.chandef;
3378         struct ieee80211_chanctx *ctx;
3379         int num_chanctx = 0;
3380
3381         mutex_lock(&local->chanctx_mtx);
3382         list_for_each_entry(ctx, &local->chanctx_list, list) {
3383                 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
3384                         continue;
3385
3386                 num_chanctx++;
3387                 chandef = ctx->conf.def;
3388         }
3389         mutex_unlock(&local->chanctx_mtx);
3390
3391         rtnl_lock();
3392         ieee80211_dfs_cac_cancel(local);
3393         rtnl_unlock();
3394
3395         if (num_chanctx > 1)
3396                 /* XXX: multi-channel is not supported yet */
3397                 WARN_ON(1);
3398         else
3399                 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
3400 }
3401
3402 void ieee80211_radar_detected(struct ieee80211_hw *hw)
3403 {
3404         struct ieee80211_local *local = hw_to_local(hw);
3405
3406         trace_api_radar_detected(local);
3407
3408         schedule_work(&local->radar_detected_work);
3409 }
3410 EXPORT_SYMBOL(ieee80211_radar_detected);
3411
3412 u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
3413 {
3414         u32 ret;
3415         int tmp;
3416
3417         switch (c->width) {
3418         case NL80211_CHAN_WIDTH_20:
3419                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3420                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3421                 break;
3422         case NL80211_CHAN_WIDTH_40:
3423                 c->width = NL80211_CHAN_WIDTH_20;
3424                 c->center_freq1 = c->chan->center_freq;
3425                 ret = IEEE80211_STA_DISABLE_40MHZ |
3426                       IEEE80211_STA_DISABLE_VHT;
3427                 break;
3428         case NL80211_CHAN_WIDTH_80:
3429                 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
3430                 /* n_P40 */
3431                 tmp /= 2;
3432                 /* freq_P40 */
3433                 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
3434                 c->width = NL80211_CHAN_WIDTH_40;
3435                 ret = IEEE80211_STA_DISABLE_VHT;
3436                 break;
3437         case NL80211_CHAN_WIDTH_80P80:
3438                 c->center_freq2 = 0;
3439                 c->width = NL80211_CHAN_WIDTH_80;
3440                 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3441                       IEEE80211_STA_DISABLE_160MHZ;
3442                 break;
3443         case NL80211_CHAN_WIDTH_160:
3444                 /* n_P20 */
3445                 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
3446                 /* n_P80 */
3447                 tmp /= 4;
3448                 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
3449                 c->width = NL80211_CHAN_WIDTH_80;
3450                 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3451                       IEEE80211_STA_DISABLE_160MHZ;
3452                 break;
3453         default:
3454         case NL80211_CHAN_WIDTH_20_NOHT:
3455                 WARN_ON_ONCE(1);
3456                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3457                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3458                 break;
3459         case NL80211_CHAN_WIDTH_5:
3460         case NL80211_CHAN_WIDTH_10:
3461                 WARN_ON_ONCE(1);
3462                 /* keep c->width */
3463                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3464                 break;
3465         }
3466
3467         WARN_ON_ONCE(!cfg80211_chandef_valid(c));
3468
3469         return ret;
3470 }
3471
3472 /*
3473  * Returns true if smps_mode_new is strictly more restrictive than
3474  * smps_mode_old.
3475  */
3476 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
3477                                    enum ieee80211_smps_mode smps_mode_new)
3478 {
3479         if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
3480                          smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
3481                 return false;
3482
3483         switch (smps_mode_old) {
3484         case IEEE80211_SMPS_STATIC:
3485                 return false;
3486         case IEEE80211_SMPS_DYNAMIC:
3487                 return smps_mode_new == IEEE80211_SMPS_STATIC;
3488         case IEEE80211_SMPS_OFF:
3489                 return smps_mode_new != IEEE80211_SMPS_OFF;
3490         default:
3491                 WARN_ON(1);
3492         }
3493
3494         return false;
3495 }
3496
3497 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
3498                               struct cfg80211_csa_settings *csa_settings)
3499 {
3500         struct sk_buff *skb;
3501         struct ieee80211_mgmt *mgmt;
3502         struct ieee80211_local *local = sdata->local;
3503         int freq;
3504         int hdr_len = offsetofend(struct ieee80211_mgmt,
3505                                   u.action.u.chan_switch);
3506         u8 *pos;
3507
3508         if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
3509             sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
3510                 return -EOPNOTSUPP;
3511
3512         skb = dev_alloc_skb(local->tx_headroom + hdr_len +
3513                             5 + /* channel switch announcement element */
3514                             3 + /* secondary channel offset element */
3515                             5 + /* wide bandwidth channel switch announcement */
3516                             8); /* mesh channel switch parameters element */
3517         if (!skb)
3518                 return -ENOMEM;
3519
3520         skb_reserve(skb, local->tx_headroom);
3521         mgmt = skb_put_zero(skb, hdr_len);
3522         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
3523                                           IEEE80211_STYPE_ACTION);
3524
3525         eth_broadcast_addr(mgmt->da);
3526         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
3527         if (ieee80211_vif_is_mesh(&sdata->vif)) {
3528                 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
3529         } else {
3530                 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
3531                 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
3532         }
3533         mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
3534         mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
3535         pos = skb_put(skb, 5);
3536         *pos++ = WLAN_EID_CHANNEL_SWITCH;                       /* EID */
3537         *pos++ = 3;                                             /* IE length */
3538         *pos++ = csa_settings->block_tx ? 1 : 0;                /* CSA mode */
3539         freq = csa_settings->chandef.chan->center_freq;
3540         *pos++ = ieee80211_frequency_to_channel(freq);          /* channel */
3541         *pos++ = csa_settings->count;                           /* count */
3542
3543         if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
3544                 enum nl80211_channel_type ch_type;
3545
3546                 skb_put(skb, 3);
3547                 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET;     /* EID */
3548                 *pos++ = 1;                                     /* IE length */
3549                 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
3550                 if (ch_type == NL80211_CHAN_HT40PLUS)
3551                         *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
3552                 else
3553                         *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
3554         }
3555
3556         if (ieee80211_vif_is_mesh(&sdata->vif)) {
3557                 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
3558
3559                 skb_put(skb, 8);
3560                 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM;            /* EID */
3561                 *pos++ = 6;                                     /* IE length */
3562                 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL;     /* Mesh TTL */
3563                 *pos = 0x00;    /* Mesh Flag: Tx Restrict, Initiator, Reason */
3564                 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
3565                 *pos++ |= csa_settings->block_tx ?
3566                           WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
3567                 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
3568                 pos += 2;
3569                 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
3570                 pos += 2;
3571         }
3572
3573         if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_80 ||
3574             csa_settings->chandef.width == NL80211_CHAN_WIDTH_80P80 ||
3575             csa_settings->chandef.width == NL80211_CHAN_WIDTH_160) {
3576                 skb_put(skb, 5);
3577                 ieee80211_ie_build_wide_bw_cs(pos, &csa_settings->chandef);
3578         }
3579
3580         ieee80211_tx_skb(sdata, skb);
3581         return 0;
3582 }
3583
3584 bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs)
3585 {
3586         return !(cs == NULL || cs->cipher == 0 ||
3587                  cs->hdr_len < cs->pn_len + cs->pn_off ||
3588                  cs->hdr_len <= cs->key_idx_off ||
3589                  cs->key_idx_shift > 7 ||
3590                  cs->key_idx_mask == 0);
3591 }
3592
3593 bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n)
3594 {
3595         int i;
3596
3597         /* Ensure we have enough iftype bitmap space for all iftype values */
3598         WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype));
3599
3600         for (i = 0; i < n; i++)
3601                 if (!ieee80211_cs_valid(&cs[i]))
3602                         return false;
3603
3604         return true;
3605 }
3606
3607 const struct ieee80211_cipher_scheme *
3608 ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
3609                  enum nl80211_iftype iftype)
3610 {
3611         const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes;
3612         int n = local->hw.n_cipher_schemes;
3613         int i;
3614         const struct ieee80211_cipher_scheme *cs = NULL;
3615
3616         for (i = 0; i < n; i++) {
3617                 if (l[i].cipher == cipher) {
3618                         cs = &l[i];
3619                         break;
3620                 }
3621         }
3622
3623         if (!cs || !(cs->iftype & BIT(iftype)))
3624                 return NULL;
3625
3626         return cs;
3627 }
3628
3629 int ieee80211_cs_headroom(struct ieee80211_local *local,
3630                           struct cfg80211_crypto_settings *crypto,
3631                           enum nl80211_iftype iftype)
3632 {
3633         const struct ieee80211_cipher_scheme *cs;
3634         int headroom = IEEE80211_ENCRYPT_HEADROOM;
3635         int i;
3636
3637         for (i = 0; i < crypto->n_ciphers_pairwise; i++) {
3638                 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i],
3639                                       iftype);
3640
3641                 if (cs && headroom < cs->hdr_len)
3642                         headroom = cs->hdr_len;
3643         }
3644
3645         cs = ieee80211_cs_get(local, crypto->cipher_group, iftype);
3646         if (cs && headroom < cs->hdr_len)
3647                 headroom = cs->hdr_len;
3648
3649         return headroom;
3650 }
3651
3652 static bool
3653 ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
3654 {
3655         s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
3656         int skip;
3657
3658         if (end > 0)
3659                 return false;
3660
3661         /* One shot NOA  */
3662         if (data->count[i] == 1)
3663                 return false;
3664
3665         if (data->desc[i].interval == 0)
3666                 return false;
3667
3668         /* End time is in the past, check for repetitions */
3669         skip = DIV_ROUND_UP(-end, data->desc[i].interval);
3670         if (data->count[i] < 255) {
3671                 if (data->count[i] <= skip) {
3672                         data->count[i] = 0;
3673                         return false;
3674                 }
3675
3676                 data->count[i] -= skip;
3677         }
3678
3679         data->desc[i].start += skip * data->desc[i].interval;
3680
3681         return true;
3682 }
3683
3684 static bool
3685 ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
3686                              s32 *offset)
3687 {
3688         bool ret = false;
3689         int i;
3690
3691         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3692                 s32 cur;
3693
3694                 if (!data->count[i])
3695                         continue;
3696
3697                 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
3698                         ret = true;
3699
3700                 cur = data->desc[i].start - tsf;
3701                 if (cur > *offset)
3702                         continue;
3703
3704                 cur = data->desc[i].start + data->desc[i].duration - tsf;
3705                 if (cur > *offset)
3706                         *offset = cur;
3707         }
3708
3709         return ret;
3710 }
3711
3712 static u32
3713 ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
3714 {
3715         s32 offset = 0;
3716         int tries = 0;
3717         /*
3718          * arbitrary limit, used to avoid infinite loops when combined NoA
3719          * descriptors cover the full time period.
3720          */
3721         int max_tries = 5;
3722
3723         ieee80211_extend_absent_time(data, tsf, &offset);
3724         do {
3725                 if (!ieee80211_extend_absent_time(data, tsf, &offset))
3726                         break;
3727
3728                 tries++;
3729         } while (tries < max_tries);
3730
3731         return offset;
3732 }
3733
3734 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
3735 {
3736         u32 next_offset = BIT(31) - 1;
3737         int i;
3738
3739         data->absent = 0;
3740         data->has_next_tsf = false;
3741         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3742                 s32 start;
3743
3744                 if (!data->count[i])
3745                         continue;
3746
3747                 ieee80211_extend_noa_desc(data, tsf, i);
3748                 start = data->desc[i].start - tsf;
3749                 if (start <= 0)
3750                         data->absent |= BIT(i);
3751
3752                 if (next_offset > start)
3753                         next_offset = start;
3754
3755                 data->has_next_tsf = true;
3756         }
3757
3758         if (data->absent)
3759                 next_offset = ieee80211_get_noa_absent_time(data, tsf);
3760
3761         data->next_tsf = tsf + next_offset;
3762 }
3763 EXPORT_SYMBOL(ieee80211_update_p2p_noa);
3764
3765 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
3766                             struct ieee80211_noa_data *data, u32 tsf)
3767 {
3768         int ret = 0;
3769         int i;
3770
3771         memset(data, 0, sizeof(*data));
3772
3773         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3774                 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
3775
3776                 if (!desc->count || !desc->duration)
3777                         continue;
3778
3779                 data->count[i] = desc->count;
3780                 data->desc[i].start = le32_to_cpu(desc->start_time);
3781                 data->desc[i].duration = le32_to_cpu(desc->duration);
3782                 data->desc[i].interval = le32_to_cpu(desc->interval);
3783
3784                 if (data->count[i] > 1 &&
3785                     data->desc[i].interval < data->desc[i].duration)
3786                         continue;
3787
3788                 ieee80211_extend_noa_desc(data, tsf, i);
3789                 ret++;
3790         }
3791
3792         if (ret)
3793                 ieee80211_update_p2p_noa(data, tsf);
3794
3795         return ret;
3796 }
3797 EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
3798
3799 void ieee80211_recalc_dtim(struct ieee80211_local *local,
3800                            struct ieee80211_sub_if_data *sdata)
3801 {
3802         u64 tsf = drv_get_tsf(local, sdata);
3803         u64 dtim_count = 0;
3804         u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
3805         u8 dtim_period = sdata->vif.bss_conf.dtim_period;
3806         struct ps_data *ps;
3807         u8 bcns_from_dtim;
3808
3809         if (tsf == -1ULL || !beacon_int || !dtim_period)
3810                 return;
3811
3812         if (sdata->vif.type == NL80211_IFTYPE_AP ||
3813             sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
3814                 if (!sdata->bss)
3815                         return;
3816
3817                 ps = &sdata->bss->ps;
3818         } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
3819                 ps = &sdata->u.mesh.ps;
3820         } else {
3821                 return;
3822         }
3823
3824         /*
3825          * actually finds last dtim_count, mac80211 will update in
3826          * __beacon_add_tim().
3827          * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
3828          */
3829         do_div(tsf, beacon_int);
3830         bcns_from_dtim = do_div(tsf, dtim_period);
3831         /* just had a DTIM */
3832         if (!bcns_from_dtim)
3833                 dtim_count = 0;
3834         else
3835                 dtim_count = dtim_period - bcns_from_dtim;
3836
3837         ps->dtim_count = dtim_count;
3838 }
3839
3840 static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
3841                                          struct ieee80211_chanctx *ctx)
3842 {
3843         struct ieee80211_sub_if_data *sdata;
3844         u8 radar_detect = 0;
3845
3846         lockdep_assert_held(&local->chanctx_mtx);
3847
3848         if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
3849                 return 0;
3850
3851         list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list)
3852                 if (sdata->reserved_radar_required)
3853                         radar_detect |= BIT(sdata->reserved_chandef.width);
3854
3855         /*
3856          * An in-place reservation context should not have any assigned vifs
3857          * until it replaces the other context.
3858          */
3859         WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
3860                 !list_empty(&ctx->assigned_vifs));
3861
3862         list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list)
3863                 if (sdata->radar_required)
3864                         radar_detect |= BIT(sdata->vif.bss_conf.chandef.width);
3865
3866         return radar_detect;
3867 }
3868
3869 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
3870                                  const struct cfg80211_chan_def *chandef,
3871                                  enum ieee80211_chanctx_mode chanmode,
3872                                  u8 radar_detect)
3873 {
3874         struct ieee80211_local *local = sdata->local;
3875         struct ieee80211_sub_if_data *sdata_iter;
3876         enum nl80211_iftype iftype = sdata->wdev.iftype;
3877         struct ieee80211_chanctx *ctx;
3878         int total = 1;
3879         struct iface_combination_params params = {
3880                 .radar_detect = radar_detect,
3881         };
3882
3883         lockdep_assert_held(&local->chanctx_mtx);
3884
3885         if (WARN_ON(hweight32(radar_detect) > 1))
3886                 return -EINVAL;
3887
3888         if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3889                     !chandef->chan))
3890                 return -EINVAL;
3891
3892         if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
3893                 return -EINVAL;
3894
3895         if (sdata->vif.type == NL80211_IFTYPE_AP ||
3896             sdata->vif.type == NL80211_IFTYPE_MESH_POINT) {
3897                 /*
3898                  * always passing this is harmless, since it'll be the
3899                  * same value that cfg80211 finds if it finds the same
3900                  * interface ... and that's always allowed
3901                  */
3902                 params.new_beacon_int = sdata->vif.bss_conf.beacon_int;
3903         }
3904
3905         /* Always allow software iftypes */
3906         if (cfg80211_iftype_allowed(local->hw.wiphy, iftype, 0, 1)) {
3907                 if (radar_detect)
3908                         return -EINVAL;
3909                 return 0;
3910         }
3911
3912         if (chandef)
3913                 params.num_different_channels = 1;
3914
3915         if (iftype != NL80211_IFTYPE_UNSPECIFIED)
3916                 params.iftype_num[iftype] = 1;
3917
3918         list_for_each_entry(ctx, &local->chanctx_list, list) {
3919                 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3920                         continue;
3921                 params.radar_detect |=
3922                         ieee80211_chanctx_radar_detect(local, ctx);
3923                 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
3924                         params.num_different_channels++;
3925                         continue;
3926                 }
3927                 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3928                     cfg80211_chandef_compatible(chandef,
3929                                                 &ctx->conf.def))
3930                         continue;
3931                 params.num_different_channels++;
3932         }
3933
3934         list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
3935                 struct wireless_dev *wdev_iter;
3936
3937                 wdev_iter = &sdata_iter->wdev;
3938
3939                 if (sdata_iter == sdata ||
3940                     !ieee80211_sdata_running(sdata_iter) ||
3941                     cfg80211_iftype_allowed(local->hw.wiphy,
3942                                             wdev_iter->iftype, 0, 1))
3943                         continue;
3944
3945                 params.iftype_num[wdev_iter->iftype]++;
3946                 total++;
3947         }
3948
3949         if (total == 1 && !params.radar_detect)
3950                 return 0;
3951
3952         return cfg80211_check_combinations(local->hw.wiphy, &params);
3953 }
3954
3955 static void
3956 ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
3957                          void *data)
3958 {
3959         u32 *max_num_different_channels = data;
3960
3961         *max_num_different_channels = max(*max_num_different_channels,
3962                                           c->num_different_channels);
3963 }
3964
3965 int ieee80211_max_num_channels(struct ieee80211_local *local)
3966 {
3967         struct ieee80211_sub_if_data *sdata;
3968         struct ieee80211_chanctx *ctx;
3969         u32 max_num_different_channels = 1;
3970         int err;
3971         struct iface_combination_params params = {0};
3972
3973         lockdep_assert_held(&local->chanctx_mtx);
3974
3975         list_for_each_entry(ctx, &local->chanctx_list, list) {
3976                 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3977                         continue;
3978
3979                 params.num_different_channels++;
3980
3981                 params.radar_detect |=
3982                         ieee80211_chanctx_radar_detect(local, ctx);
3983         }
3984
3985         list_for_each_entry_rcu(sdata, &local->interfaces, list)
3986                 params.iftype_num[sdata->wdev.iftype]++;
3987
3988         err = cfg80211_iter_combinations(local->hw.wiphy, &params,
3989                                          ieee80211_iter_max_chans,
3990                                          &max_num_different_channels);
3991         if (err < 0)
3992                 return err;
3993
3994         return max_num_different_channels;
3995 }
3996
3997 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
3998 {
3999         *buf++ = WLAN_EID_VENDOR_SPECIFIC;
4000         *buf++ = 7; /* len */
4001         *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
4002         *buf++ = 0x50;
4003         *buf++ = 0xf2;
4004         *buf++ = 2; /* WME */
4005         *buf++ = 0; /* WME info */
4006         *buf++ = 1; /* WME ver */
4007         *buf++ = qosinfo; /* U-APSD no in use */
4008
4009         return buf;
4010 }
4011
4012 void ieee80211_txq_get_depth(struct ieee80211_txq *txq,
4013                              unsigned long *frame_cnt,
4014                              unsigned long *byte_cnt)
4015 {
4016         struct txq_info *txqi = to_txq_info(txq);
4017         u32 frag_cnt = 0, frag_bytes = 0;
4018         struct sk_buff *skb;
4019
4020         skb_queue_walk(&txqi->frags, skb) {
4021                 frag_cnt++;
4022                 frag_bytes += skb->len;
4023         }
4024
4025         if (frame_cnt)
4026                 *frame_cnt = txqi->tin.backlog_packets + frag_cnt;
4027
4028         if (byte_cnt)
4029                 *byte_cnt = txqi->tin.backlog_bytes + frag_bytes;
4030 }
4031 EXPORT_SYMBOL(ieee80211_txq_get_depth);
4032
4033 const u8 ieee80211_ac_to_qos_mask[IEEE80211_NUM_ACS] = {
4034         IEEE80211_WMM_IE_STA_QOSINFO_AC_VO,
4035         IEEE80211_WMM_IE_STA_QOSINFO_AC_VI,
4036         IEEE80211_WMM_IE_STA_QOSINFO_AC_BE,
4037         IEEE80211_WMM_IE_STA_QOSINFO_AC_BK
4038 };